CVE-2025-38232

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38232", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.996Z", "datePublished": "2025-07-04T13:37:45.635Z", "dateUpdated": "2026-11-10T12:36:21.969Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:00:32.250Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix race between nfsd registration and exports_proc\n\nAs of now nfsd calls create_proc_exports_entry() at start of init_nfsd\nand cleanup by remove_proc_entry() at last of exit_nfsd.\n\nWhich causes kernel OOPs if there is race between below 2 operations:\n(i) exportfs -r\n(ii) mount -t nfsd none /proc/fs/nfsd\n\nfor 5.4 kernel ARM64:\n\nCPU 1:\nel1_irq+0xbc/0x180\narch_counter_get_cntvct+0x14/0x18\nrunning_clock+0xc/0x18\npreempt_count_add+0x88/0x110\nprep_new_page+0xb0/0x220\nget_page_from_freelist+0x2d8/0x1778\n__alloc_pages_nodemask+0x15c/0xef0\n__vmalloc_node_range+0x28c/0x478\n__vmalloc_node_flags_caller+0x8c/0xb0\nkvmalloc_node+0x88/0xe0\nnfsd_init_net+0x6c/0x108 [nfsd]\nops_init+0x44/0x170\nregister_pernet_operations+0x114/0x270\nregister_pernet_subsys+0x34/0x50\ninit_nfsd+0xa8/0x718 [nfsd]\ndo_one_initcall+0x54/0x2e0\n\nCPU 2 :\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n\nPC is at : exports_net_open+0x50/0x68 [nfsd]\n\nCall trace:\nexports_net_open+0x50/0x68 [nfsd]\nexports_proc_open+0x2c/0x38 [nfsd]\nproc_reg_open+0xb8/0x198\ndo_dentry_open+0x1c4/0x418\nvfs_open+0x38/0x48\npath_openat+0x28c/0xf18\ndo_filp_open+0x70/0xe8\ndo_sys_open+0x154/0x248\n\nSometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu().\n\nand same is happening on latest 6.14 kernel as well:\n\n[ 0.000000] Linux version 6.14.0-rc5-next-20250304-dirty\n...\n[ 285.455918] Unable to handle kernel paging request at virtual address 00001f4800001f48\n...\n[ 285.464902] pc : cache_seq_next_rcu+0x78/0xa4\n...\n[ 285.469695] Call trace:\n[ 285.470083] cache_seq_next_rcu+0x78/0xa4 (P)\n[ 285.470488] seq_read+0xe0/0x11c\n[ 285.470675] proc_reg_read+0x9c/0xf0\n[ 285.470874] vfs_read+0xc4/0x2fc\n[ 285.471057] ksys_read+0x6c/0xf4\n[ 285.471231] __arm64_sys_read+0x1c/0x28\n[ 285.471428] invoke_syscall+0x44/0x100\n[ 285.471633] el0_svc_common.constprop.0+0x40/0xe0\n[ 285.471870] do_el0_svc_compat+0x1c/0x34\n[ 285.472073] el0_svc_compat+0x2c/0x80\n[ 285.472265] el0t_32_sync_handler+0x90/0x140\n[ 285.472473] el0t_32_sync+0x19c/0x1a0\n[ 285.472887] Code: f9400885 93407c23 937d7c27 11000421 (f86378a3)\n[ 285.473422] ---[ end trace 0000000000000000 ]---\n\nIt reproduced simply with below script:\nwhile [ 1 ]\ndo\n/exportfs -r\ndone &\n\nwhile [ 1 ]\ndo\ninsmod /nfsd.ko\nmount -t nfsd none /proc/fs/nfsd\numount /proc/fs/nfsd\nrmmod nfsd\ndone &\n\nSo exporting interfaces to user space shall be done at last and\ncleanup at first place.\n\nWith change there is no Kernel OOPs."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The race is reached through local syscalls only \u2014 `open()`/`read()` on the world-readable `/proc/fs/nfs/exports` racing against nfsd module init/exit; no NFS protocol traffic can trigger `init_nfsd()`/`exit_nfsd()` or the proc-entry path.\nAC:L - The attacker controls both sides of the race: spinning open/read loops on multiple CPUs while triggering nfsd module autoload via `unshare -Urm` + `mount -t nfsd`, and the commit's own reproducer shows the oops occurs reliably (\"Sometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu()\").\nPR:L - `proc_create(\"exports\", 0, ...)` defaults to 0444, so any unprivileged local user can open and read the file, and module autoload is reachable from an unprivileged user namespace because `request_module(\"fs-nfsd\")` runs before the `FS_USERNS_MOUNT` capability check in fs/super.c.\nUI:N - The attacker performs all steps itself \u2014 the reader loop and the module-load trigger \u2014 with no action required from any other user or administrator.\nS:U - The corruption and its consequences are confined to the kernel's own memory and the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - On the unload path the reader holds a freed `cache_detail`, and `__cache_seq_start`/`cache_seq_next` walk freed hash tables whose contents `e_show()`/`svc_export_show()` format into the seq buffer returned to userspace, leaking arbitrary reallocated kernel heap data; the init path additionally dereferences an uninitialized `net_generic` slot as a pointer.\nI:H - This is a use-after-free on `nn->svc_export_cache` and the `nfsd_net` itself \u2014 the attacker can spray the freed slab and have the kernel treat attacker-controlled bytes as `cache_detail`/`cache_head` fields and list pointers, giving a path to controlled writes and control-flow corruption.\nA:H - The commit documents reproducible kernel oopses on both arm64 5.4 (NULL deref at 0x10 in `exports_net_open`) and 6.14 (paging fault in `cache_seq_next_rcu`), and an unprivileged user can retrigger the crash at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfsctl.c"], "versions": [{"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "49b57b98fa601ae6cc7897bab4515129da8290f7", "status": "affected", "versionType": "git"}, {"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "88d6785c173a7c4de05bef8c4fd8a9b42ead02d5", "status": "affected", 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"status": "affected", "versionType": "semver"}, {"version": "5.10.20", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.11.3", "lessThan": "5.12", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfsctl.c"], "versions": [{"version": "5.12", "status": "affected"}, {"version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.199", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.162", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.122", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.35", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.4", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.15.199"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.1.162"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.6.122"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.12.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", 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"https://git.kernel.org/stable/c/f7fb730cac9aafda8b9813b55d04e28a9664d17c"}], "title": "NFSD: fix race between nfsd registration and exports_proc", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-38232", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-10T20:41:24.428809Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T18:44:12.027Z"}}, {"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-11-10T12:36:21.969Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", 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"134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T17:38:19.733Z"}}], "cna": {"title": "NFSD: fix race between nfsd registration and exports_proc", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The race is reached through local syscalls only \u2014 `open()`/`read()` on the world-readable `/proc/fs/nfs/exports` racing against nfsd module init/exit; no NFS protocol traffic can trigger `init_nfsd()`/`exit_nfsd()` or the proc-entry path.\nAC:L - The attacker controls both sides of the race: spinning open/read loops on multiple CPUs while triggering nfsd module autoload via `unshare -Urm` + `mount -t nfsd`, and the commit's own reproducer shows the oops occurs reliably (\"Sometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu()\").\nPR:L - `proc_create(\"exports\", 0, ...)` defaults to 0444, so any unprivileged local user can open and read the file, and module autoload is reachable from an unprivileged user namespace because `request_module(\"fs-nfsd\")` runs before the `FS_USERNS_MOUNT` capability check in fs/super.c.\nUI:N - The attacker performs all steps itself \u2014 the reader loop and the module-load trigger \u2014 with no action required from any other user or administrator.\nS:U - The corruption and its consequences are confined to the kernel's own memory and the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - On the unload path the reader holds a freed `cache_detail`, and `__cache_seq_start`/`cache_seq_next` walk freed hash tables whose contents `e_show()`/`svc_export_show()` format into the seq buffer returned to userspace, leaking arbitrary reallocated kernel heap data; the init path additionally dereferences an uninitialized `net_generic` slot as a pointer.\nI:H - This is a use-after-free on `nn->svc_export_cache` and the `nfsd_net` itself \u2014 the attacker can spray the freed slab and have the kernel treat attacker-controlled bytes as `cache_detail`/`cache_head` fields and list pointers, giving a path to controlled writes and control-flow corruption.\nA:H - The commit documents reproducible kernel oopses on both arm64 5.4 (NULL deref at 0x10 in `exports_net_open`) and 6.14 (paging fault in `cache_seq_next_rcu`), and an unprivileged user can retrigger the crash at will."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "49b57b98fa601ae6cc7897bab4515129da8290f7", "versionType": "git"}, {"status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "88d6785c173a7c4de05bef8c4fd8a9b42ead02d5", "versionType": "git"}, {"status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "8120e420013d947c890f358f30a2d98ba8ac20bc", "versionType": "git"}, {"status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "2029ca75cdfa6a25716a5a76b751486cce7e3822", "versionType": "git"}, {"status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "327011a2bb4f7de9c72b891a96ce8d902828bddf", "versionType": "git"}, {"status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "lessThan": "f7fb730cac9aafda8b9813b55d04e28a9664d17c", "versionType": "git"}, {"status": "affected", "version": "8677e99150b0830d29cc1318b4cc559e176940bb", "versionType": "git"}, {"status": "affected", "version": "7c7cb07d4affcf41749234fe9dc4d90cd3959e32", "versionType": "git"}, {"status": "affected", "version": "4d41f65efeec0a6da6088341203c81e49ebfcd90", "versionType": "git"}, {"status": "affected", "version": "5.4.102", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "5.10.20", "lessThan": "5.11", "versionType": "semver"}, {"status": "affected", "version": "5.11.3", "lessThan": "5.12", "versionType": "semver"}], "programFiles": ["fs/nfsd/nfsctl.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.12"}, {"status": "unaffected", "version": "0", "lessThan": "5.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.199", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.162", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.122", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.35", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.15.4", "versionType": "semver", "lessThanOrEqual": "6.15.*"}, {"status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/nfsd/nfsctl.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/49b57b98fa601ae6cc7897bab4515129da8290f7"}, {"url": "https://git.kernel.org/stable/c/88d6785c173a7c4de05bef8c4fd8a9b42ead02d5"}, {"url": "https://git.kernel.org/stable/c/8120e420013d947c890f358f30a2d98ba8ac20bc"}, {"url": "https://git.kernel.org/stable/c/2029ca75cdfa6a25716a5a76b751486cce7e3822"}, {"url": "https://git.kernel.org/stable/c/327011a2bb4f7de9c72b891a96ce8d902828bddf"}, {"url": "https://git.kernel.org/stable/c/f7fb730cac9aafda8b9813b55d04e28a9664d17c"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix race between nfsd registration and exports_proc\n\nAs of now nfsd calls create_proc_exports_entry() at start of init_nfsd\nand cleanup by remove_proc_entry() at last of exit_nfsd.\n\nWhich causes kernel OOPs if there is race between below 2 operations:\n(i) exportfs -r\n(ii) mount -t nfsd none /proc/fs/nfsd\n\nfor 5.4 kernel ARM64:\n\nCPU 1:\nel1_irq+0xbc/0x180\narch_counter_get_cntvct+0x14/0x18\nrunning_clock+0xc/0x18\npreempt_count_add+0x88/0x110\nprep_new_page+0xb0/0x220\nget_page_from_freelist+0x2d8/0x1778\n__alloc_pages_nodemask+0x15c/0xef0\n__vmalloc_node_range+0x28c/0x478\n__vmalloc_node_flags_caller+0x8c/0xb0\nkvmalloc_node+0x88/0xe0\nnfsd_init_net+0x6c/0x108 [nfsd]\nops_init+0x44/0x170\nregister_pernet_operations+0x114/0x270\nregister_pernet_subsys+0x34/0x50\ninit_nfsd+0xa8/0x718 [nfsd]\ndo_one_initcall+0x54/0x2e0\n\nCPU 2 :\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n\nPC is at : exports_net_open+0x50/0x68 [nfsd]\n\nCall trace:\nexports_net_open+0x50/0x68 [nfsd]\nexports_proc_open+0x2c/0x38 [nfsd]\nproc_reg_open+0xb8/0x198\ndo_dentry_open+0x1c4/0x418\nvfs_open+0x38/0x48\npath_openat+0x28c/0xf18\ndo_filp_open+0x70/0xe8\ndo_sys_open+0x154/0x248\n\nSometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu().\n\nand same is happening on latest 6.14 kernel as well:\n\n[ 0.000000] Linux version 6.14.0-rc5-next-20250304-dirty\n...\n[ 285.455918] Unable to handle kernel paging request at virtual address 00001f4800001f48\n...\n[ 285.464902] pc : cache_seq_next_rcu+0x78/0xa4\n...\n[ 285.469695] Call trace:\n[ 285.470083] cache_seq_next_rcu+0x78/0xa4 (P)\n[ 285.470488] seq_read+0xe0/0x11c\n[ 285.470675] proc_reg_read+0x9c/0xf0\n[ 285.470874] vfs_read+0xc4/0x2fc\n[ 285.471057] ksys_read+0x6c/0xf4\n[ 285.471231] __arm64_sys_read+0x1c/0x28\n[ 285.471428] invoke_syscall+0x44/0x100\n[ 285.471633] el0_svc_common.constprop.0+0x40/0xe0\n[ 285.471870] do_el0_svc_compat+0x1c/0x34\n[ 285.472073] el0_svc_compat+0x2c/0x80\n[ 285.472265] el0t_32_sync_handler+0x90/0x140\n[ 285.472473] el0t_32_sync+0x19c/0x1a0\n[ 285.472887] Code: f9400885 93407c23 937d7c27 11000421 (f86378a3)\n[ 285.473422] ---[ end trace 0000000000000000 ]---\n\nIt reproduced simply with below script:\nwhile [ 1 ]\ndo\n/exportfs -r\ndone &\n\nwhile [ 1 ]\ndo\ninsmod /nfsd.ko\nmount -t nfsd none /proc/fs/nfsd\numount /proc/fs/nfsd\nrmmod nfsd\ndone &\n\nSo exporting interfaces to user space shall be done at last and\ncleanup at first place.\n\nWith change there is no Kernel OOPs."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.199", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.162", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.122", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.35", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.15.4", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.16", "versionStartIncluding": "5.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.102"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.10.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.11.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:00:32.250Z"}}}, "cveMetadata": {"cveId": "CVE-2025-38232", "state": "PUBLISHED", "dateUpdated": "2026-11-10T12:36:21.969Z", "dateReserved": "2025-04-16T04:51:23.996Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-07-04T13:37:45.635Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfsctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "49b57b98fa601ae6cc7897bab4515129da8290f7", "status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "versionType": "git"}, {"lessThan": "88d6785c173a7c4de05bef8c4fd8a9b42ead02d5", "status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "versionType": "git"}, {"lessThan": "8120e420013d947c890f358f30a2d98ba8ac20bc", "status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "versionType": "git"}, {"lessThan": "2029ca75cdfa6a25716a5a76b751486cce7e3822", "status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "versionType": "git"}, {"lessThan": "327011a2bb4f7de9c72b891a96ce8d902828bddf", "status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "versionType": "git"}, {"lessThan": "f7fb730cac9aafda8b9813b55d04e28a9664d17c", "status": "affected", "version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7", "versionType": "git"}, {"status": "affected", "version": "8677e99150b0830d29cc1318b4cc559e176940bb", "versionType": "git"}, {"status": "affected", "version": "7c7cb07d4affcf41749234fe9dc4d90cd3959e32", "versionType": "git"}, {"status": "affected", "version": "4d41f65efeec0a6da6088341203c81e49ebfcd90", "versionType": "git"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.102", "versionType": "semver"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.20", "versionType": "semver"}, {"lessThan": "5.12", "status": "affected", "version": "5.11.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfsd/nfsctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.12"}, {"lessThan": "5.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.199", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.162", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.122", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.35", "versionType": "semver"}, {"lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"affectedData": [{"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B6592B0B-A570-4D3F-A648-F0CA0C7A6770", "versionEndExcluding": "6.12.35", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "DFD174C5-1AA2-4671-BDDC-1A9FCC753655", "versionEndExcluding": "6.15.4", "versionStartIncluding": "6.13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix race between nfsd registration and exports_proc\n\nAs of now nfsd calls create_proc_exports_entry() at start of init_nfsd\nand cleanup by remove_proc_entry() at last of exit_nfsd.\n\nWhich causes kernel OOPs if there is race between below 2 operations:\n(i) exportfs -r\n(ii) mount -t nfsd none /proc/fs/nfsd\n\nfor 5.4 kernel ARM64:\n\nCPU 1:\nel1_irq+0xbc/0x180\narch_counter_get_cntvct+0x14/0x18\nrunning_clock+0xc/0x18\npreempt_count_add+0x88/0x110\nprep_new_page+0xb0/0x220\nget_page_from_freelist+0x2d8/0x1778\n__alloc_pages_nodemask+0x15c/0xef0\n__vmalloc_node_range+0x28c/0x478\n__vmalloc_node_flags_caller+0x8c/0xb0\nkvmalloc_node+0x88/0xe0\nnfsd_init_net+0x6c/0x108 [nfsd]\nops_init+0x44/0x170\nregister_pernet_operations+0x114/0x270\nregister_pernet_subsys+0x34/0x50\ninit_nfsd+0xa8/0x718 [nfsd]\ndo_one_initcall+0x54/0x2e0\n\nCPU 2 :\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n\nPC is at : exports_net_open+0x50/0x68 [nfsd]\n\nCall trace:\nexports_net_open+0x50/0x68 [nfsd]\nexports_proc_open+0x2c/0x38 [nfsd]\nproc_reg_open+0xb8/0x198\ndo_dentry_open+0x1c4/0x418\nvfs_open+0x38/0x48\npath_openat+0x28c/0xf18\ndo_filp_open+0x70/0xe8\ndo_sys_open+0x154/0x248\n\nSometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu().\n\nand same is happening on latest 6.14 kernel as well:\n\n[ 0.000000] Linux version 6.14.0-rc5-next-20250304-dirty\n...\n[ 285.455918] Unable to handle kernel paging request at virtual address 00001f4800001f48\n...\n[ 285.464902] pc : cache_seq_next_rcu+0x78/0xa4\n...\n[ 285.469695] Call trace:\n[ 285.470083] cache_seq_next_rcu+0x78/0xa4 (P)\n[ 285.470488] seq_read+0xe0/0x11c\n[ 285.470675] proc_reg_read+0x9c/0xf0\n[ 285.470874] vfs_read+0xc4/0x2fc\n[ 285.471057] ksys_read+0x6c/0xf4\n[ 285.471231] __arm64_sys_read+0x1c/0x28\n[ 285.471428] invoke_syscall+0x44/0x100\n[ 285.471633] el0_svc_common.constprop.0+0x40/0xe0\n[ 285.471870] do_el0_svc_compat+0x1c/0x34\n[ 285.472073] el0_svc_compat+0x2c/0x80\n[ 285.472265] el0t_32_sync_handler+0x90/0x140\n[ 285.472473] el0t_32_sync+0x19c/0x1a0\n[ 285.472887] Code: f9400885 93407c23 937d7c27 11000421 (f86378a3)\n[ 285.473422] ---[ end trace 0000000000000000 ]---\n\nIt reproduced simply with below script:\nwhile [ 1 ]\ndo\n/exportfs -r\ndone &\n\nwhile [ 1 ]\ndo\ninsmod /nfsd.ko\nmount -t nfsd none /proc/fs/nfsd\numount /proc/fs/nfsd\nrmmod nfsd\ndone &\n\nSo exporting interfaces to user space shall be done at last and\ncleanup at first place.\n\nWith change there is no Kernel OOPs."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSD: se corrige la ejecuci\u00f3n entre el registro de nfsd y exports_proc A partir de ahora, nfsd llama a create_proc_exports_entry() al inicio de init_nfsd y realiza una limpieza mediante remove_proc_entry() al final de exit_nfsd. Lo que provoca errores OOP del kernel si hay una ejecuci\u00f3n entre las siguientes 2 operaciones: (i) exportfs -r (ii) mount -t nfsd none /proc/fs/nfsd for 5.4 kernel ARM64: CPU 1: el1_irq+0xbc/0x180 arch_counter_get_cntvct+0x14/0x18 running_clock+0xc/0x18 preempt_count_add+0x88/0x110 prep_new_page+0xb0/0x220 get_page_from_freelist+0x2d8/0x1778 __alloc_pages_nodemask+0x15c/0xef0 __vmalloc_node_range+0x28c/0x478 __vmalloc_node_flags_caller+0x8c/0xb0 kvmalloc_node+0x88/0xe0 nfsd_init_net+0x6c/0x108 [nfsd] ops_init+0x44/0x170 register_pernet_operations+0x114/0x270 register_pernet_subsys+0x34/0x50 init_nfsd+0xa8/0x718 [nfsd] do_one_initcall+0x54/0x2e0 CPU 2 : Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 PC is at : exports_net_open+0x50/0x68 [nfsd] Call trace: exports_net_open+0x50/0x68 [nfsd] exports_proc_open+0x2c/0x38 [nfsd] proc_reg_open+0xb8/0x198 do_dentry_open+0x1c4/0x418 vfs_open+0x38/0x48 path_openat+0x28c/0xf18 do_filp_open+0x70/0xe8 do_sys_open+0x154/0x248 Sometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu(). and same is happening on latest 6.14 kernel as well: [ 0.000000] Linux version 6.14.0-rc5-next-20250304-dirty ... [ 285.455918] Unable to handle kernel paging request at virtual address 00001f4800001f48 ... [ 285.464902] pc : cache_seq_next_rcu+0x78/0xa4 ... [ 285.469695] Call trace: [ 285.470083] cache_seq_next_rcu+0x78/0xa4 (P) [ 285.470488] seq_read+0xe0/0x11c [ 285.470675] proc_reg_read+0x9c/0xf0 [ 285.470874] vfs_read+0xc4/0x2fc [ 285.471057] ksys_read+0x6c/0xf4 [ 285.471231] __arm64_sys_read+0x1c/0x28 [ 285.471428] invoke_syscall+0x44/0x100 [ 285.471633] el0_svc_common.constprop.0+0x40/0xe0 [ 285.471870] do_el0_svc_compat+0x1c/0x34 [ 285.472073] el0_svc_compat+0x2c/0x80 [ 285.472265] el0t_32_sync_handler+0x90/0x140 [ 285.472473] el0t_32_sync+0x19c/0x1a0 [ 285.472887] Code: f9400885 93407c23 937d7c27 11000421 (f86378a3) [ 285.473422] ---[ fin del seguimiento 0000000000000000 ]--- Se reprodujo simplemente con el siguiente script: mientras [ 1 ] do /exportfs -r done & mientras [ 1 ] do insmod /nfsd.ko mount -t nfsd none /proc/fs/nfsd umount /proc/fs/nfsd rmmod nfsd done & Por lo tanto, la exportaci\u00f3n de interfaces al espacio de usuario se realizar\u00e1 Por fin, listo y con limpieza desde el principio. Con el cambio, no hay problemas de POO del kernel."}], "id": "CVE-2025-38232", "lastModified": "2026-11-10T13:17:46.643", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-38232", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T20:41:24.428809Z", "version": "2.0.3"}}]}, "published": "2025-07-04T14:15:32.810", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2029ca75cdfa6a25716a5a76b751486cce7e3822"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/327011a2bb4f7de9c72b891a96ce8d902828bddf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49b57b98fa601ae6cc7897bab4515129da8290f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8120e420013d947c890f358f30a2d98ba8ac20bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/88d6785c173a7c4de05bef8c4fd8a9b42ead02d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f7fb730cac9aafda8b9813b55d04e28a9664d17c"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: NFSD: fix race between nfsd registration and exports_proc", "id": "2376410", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376410"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nNFSD: fix race between nfsd registration and exports_proc\nAs of now nfsd calls create_proc_exports_entry() at start of init_nfsd\nand cleanup by remove_proc_entry() at last of exit_nfsd.\nWhich causes kernel OOPs if there is race between below 2 operations:\n(i) exportfs -r\n(ii) mount -t nfsd none /proc/fs/nfsd\nfor 5.4 kernel ARM64:\nCPU 1:\nel1_irq+0xbc/0x180\narch_counter_get_cntvct+0x14/0x18\nrunning_clock+0xc/0x18\npreempt_count_add+0x88/0x110\nprep_new_page+0xb0/0x220\nget_page_from_freelist+0x2d8/0x1778\n__alloc_pages_nodemask+0x15c/0xef0\n__vmalloc_node_range+0x28c/0x478\n__vmalloc_node_flags_caller+0x8c/0xb0\nkvmalloc_node+0x88/0xe0\nnfsd_init_net+0x6c/0x108 [nfsd]\nops_init+0x44/0x170\nregister_pernet_operations+0x114/0x270\nregister_pernet_subsys+0x34/0x50\ninit_nfsd+0xa8/0x718 [nfsd]\ndo_one_initcall+0x54/0x2e0\nCPU 2 :\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000010\nPC is at : exports_net_open+0x50/0x68 [nfsd]\nCall trace:\nexports_net_open+0x50/0x68 [nfsd]\nexports_proc_open+0x2c/0x38 [nfsd]\nproc_reg_open+0xb8/0x198\ndo_dentry_open+0x1c4/0x418\nvfs_open+0x38/0x48\npath_openat+0x28c/0xf18\ndo_filp_open+0x70/0xe8\ndo_sys_open+0x154/0x248\nSometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu().\nand same is happening on latest 6.14 kernel as well:\n[ 0.000000] Linux version 6.14.0-rc5-next-20250304-dirty\n...\n[ 285.455918] Unable to handle kernel paging request at virtual address 00001f4800001f48\n...\n[ 285.464902] pc : cache_seq_next_rcu+0x78/0xa4\n...\n[ 285.469695] Call trace:\n[ 285.470083] cache_seq_next_rcu+0x78/0xa4 (P)\n[ 285.470488] seq_read+0xe0/0x11c\n[ 285.470675] proc_reg_read+0x9c/0xf0\n[ 285.470874] vfs_read+0xc4/0x2fc\n[ 285.471057] ksys_read+0x6c/0xf4\n[ 285.471231] __arm64_sys_read+0x1c/0x28\n[ 285.471428] invoke_syscall+0x44/0x100\n[ 285.471633] el0_svc_common.constprop.0+0x40/0xe0\n[ 285.471870] do_el0_svc_compat+0x1c/0x34\n[ 285.472073] el0_svc_compat+0x2c/0x80\n[ 285.472265] el0t_32_sync_handler+0x90/0x140\n[ 285.472473] el0t_32_sync+0x19c/0x1a0\n[ 285.472887] Code: f9400885 93407c23 937d7c27 11000421 (f86378a3)\n[ 285.473422] ---[ end trace 0000000000000000 ]---\nIt reproduced simply with below script:\nwhile [ 1 ]\ndo\n/exportfs -r\ndone &\nwhile [ 1 ]\ndo\ninsmod /nfsd.ko\nmount -t nfsd none /proc/fs/nfsd\numount /proc/fs/nfsd\nrmmod nfsd\ndone &\nSo exporting interfaces to user space shall be done at last and\ncleanup at first place.\nWith change there is no Kernel OOPs."], "name": "CVE-2025-38232", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38232\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38232\nhttps://lore.kernel.org/linux-cve-announce/2025070429-CVE-2025-38232-8112@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T21:47:56.179831+00:00", "updated": "2025-07-13T21:47:56.179893+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}