CVE-2024-50257

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-50257", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.980Z", "datePublished": "2024-11-09T10:15:10.373Z", "dateUpdated": "2026-08-05T11:42:49.717Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:42:49.717Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: Fix use-after-free in get_info()\n\nip6table_nat module unload has refcnt warning for UAF. call trace is:\n\nWARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80\nModules linked in: ip6table_nat(-)\nCPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:module_put+0x6f/0x80\nCall Trace:\n <TASK>\n get_info+0x128/0x180\n do_ip6t_get_ctl+0x6a/0x430\n nf_getsockopt+0x46/0x80\n ipv6_getsockopt+0xb9/0x100\n rawv6_getsockopt+0x42/0x190\n do_sock_getsockopt+0xaa/0x180\n __sys_getsockopt+0x70/0xc0\n __x64_sys_getsockopt+0x20/0x30\n do_syscall_64+0xa2/0x1a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nConcurrent execution of module unload and get_info() trigered the warning.\nThe root cause is as follows:\n\ncpu0\t\t\t\t cpu1\nmodule_exit\n//mod->state = MODULE_STATE_GOING\n ip6table_nat_exit\n xt_unregister_template\n\tkfree(t)\n\t//removed from templ_list\n\t\t\t\t getinfo()\n\t\t\t\t\t t = xt_find_table_lock\n\t\t\t\t\t\tlist_for_each_entry(tmpl, &xt_templates[af]...)\n\t\t\t\t\t\t\tif (strcmp(tmpl->name, name))\n\t\t\t\t\t\t\t\tcontinue; //table not found\n\t\t\t\t\t\t\ttry_module_get\n\t\t\t\t\t\tlist_for_each_entry(t, &xt_net->tables[af]...)\n\t\t\t\t\t\t\treturn t; //not get refcnt\n\t\t\t\t\t module_put(t->me) //uaf\n unregister_pernet_subsys\n //remove table from xt_net list\n\nWhile xt_table module was going away and has been removed from\nxt_templates list, we couldnt get refcnt of xt_table->me. Check\nmodule in xt_net->tables list re-traversal to fix it."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is entered from a local `getsockopt(IP6T_SO_GET_INFO)`/`setsockopt` syscall via `rawv6_getsockopt` \u2192 `nf_getsockopt` \u2192 `do_ip6t_get_ctl` \u2192 `get_info`, and the racing side is a local `delete_module`. No received packet or remote peer data reaches `xt_find_table_lock()`.\nAC:H - The buggy return is only reachable while the table's module is in `MODULE_STATE_GOING` and its template has already been unregistered \u2014 i.e. inside the window between `xt_unregister_template()` and `unregister_pernet_subsys()` in the module's exit path. The attacker can spin `getsockopt` to make the collision near-certain once teardown starts, but cannot initiate the unload, so a system state outside their control must coincide.\nPR:L - `do_ip6t_get_ctl()` gates only on `ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)`, which any unprivileged user obtains with `unshare -Urn`; the same call also drives `table_init()` to register the table in the attacker's own netns, so no real root is needed for the attacker-controlled half.\nUI:N - The attacker issues the socket option calls itself and no victim has to open a file, mount anything, or interact with attacker content; the module-unload precondition is accounted for under Attack Complexity.\nS:U - The unreferenced table, the freed slab object, and the corrupted module refcount all live inside the kernel's own security authority, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - After `xt_table_unlock()` drops the mutex the `xt_table` is `kfree()`d by the concurrent `xt_unregister_table()`, so `module_put(t->me)` reads a pointer out of freed slab memory; per use-after-free scoring, control of the reallocated object's contents makes that pointer attacker-influenced and yields a kernel-memory read primitive.\nI:H - `module_put()` performs `atomic_dec_if_positive()` through the stale `t->me`, a write into freed memory \u2014 either the vfree'd `struct module` or, with heap spraying of the freed `xt_table`, an attacker-chosen address, giving a decrement primitive leverageable toward kernel memory corruption and premature unload of an in-use module.\nA:H - The reported symptom is a `WARN_ON` refcount-underflow splat in `module_put()`, which is a full panic on the many fleets running `panic_on_warn=1`, and dereferencing the freed table pointer readily oopses or trips KASAN."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/x_tables.c"], "versions": [{"version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "ba22ea01348384df19cc1fabc7964be6e7189749", "status": "affected", "versionType": "git"}, {"version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "cb7c388b5967946f097afdb759b7c860305f2d96", "status": "affected", "versionType": "git"}, {"version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "6a1f088f9807f5166f58902d26246d0b88da03a8", "status": "affected", "versionType": "git"}, {"version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "bab3bb35c03b263c486833d50d50c081d9e9832b", "status": "affected", "versionType": "git"}, {"version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "f48d258f0ac540f00fa617dac496c4c18b5dc2fa", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/x_tables.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.171", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.116", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.60", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.7", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "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": "5.15", "versionEndExcluding": "5.15.171"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.116"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.60"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.11.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ba22ea01348384df19cc1fabc7964be6e7189749"}, {"url": "https://git.kernel.org/stable/c/cb7c388b5967946f097afdb759b7c860305f2d96"}, {"url": "https://git.kernel.org/stable/c/6a1f088f9807f5166f58902d26246d0b88da03a8"}, {"url": "https://git.kernel.org/stable/c/bab3bb35c03b263c486833d50d50c081d9e9832b"}, {"url": "https://git.kernel.org/stable/c/f48d258f0ac540f00fa617dac496c4c18b5dc2fa"}], "title": "netfilter: Fix use-after-free in get_info()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50257", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-12-11T14:25:40.458302Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-12-11T14:58:32.580Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:27:37.629Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50257", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-12-11T14:25:40.458302Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-12-11T14:25:41.600Z"}}], "cna": {"title": "netfilter: Fix use-after-free in get_info()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "ba22ea01348384df19cc1fabc7964be6e7189749", "versionType": "git"}, {"status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "cb7c388b5967946f097afdb759b7c860305f2d96", "versionType": "git"}, {"status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "6a1f088f9807f5166f58902d26246d0b88da03a8", "versionType": "git"}, {"status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "bab3bb35c03b263c486833d50d50c081d9e9832b", "versionType": "git"}, {"status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "lessThan": "f48d258f0ac540f00fa617dac496c4c18b5dc2fa", "versionType": "git"}], "programFiles": ["net/netfilter/x_tables.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"status": "unaffected", "version": "0", "lessThan": "5.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.171", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.116", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.60", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.11.7", "versionType": "semver", "lessThanOrEqual": "6.11.*"}, {"status": "unaffected", "version": "6.12", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/netfilter/x_tables.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/ba22ea01348384df19cc1fabc7964be6e7189749"}, {"url": "https://git.kernel.org/stable/c/cb7c388b5967946f097afdb759b7c860305f2d96"}, {"url": "https://git.kernel.org/stable/c/6a1f088f9807f5166f58902d26246d0b88da03a8"}, {"url": "https://git.kernel.org/stable/c/bab3bb35c03b263c486833d50d50c081d9e9832b"}, {"url": "https://git.kernel.org/stable/c/f48d258f0ac540f00fa617dac496c4c18b5dc2fa"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: Fix use-after-free in get_info()\n\nip6table_nat module unload has refcnt warning for UAF. call trace is:\n\nWARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80\nModules linked in: ip6table_nat(-)\nCPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:module_put+0x6f/0x80\nCall Trace:\n <TASK>\n get_info+0x128/0x180\n do_ip6t_get_ctl+0x6a/0x430\n nf_getsockopt+0x46/0x80\n ipv6_getsockopt+0xb9/0x100\n rawv6_getsockopt+0x42/0x190\n do_sock_getsockopt+0xaa/0x180\n __sys_getsockopt+0x70/0xc0\n __x64_sys_getsockopt+0x20/0x30\n do_syscall_64+0xa2/0x1a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nConcurrent execution of module unload and get_info() trigered the warning.\nThe root cause is as follows:\n\ncpu0\t\t\t\t cpu1\nmodule_exit\n//mod->state = MODULE_STATE_GOING\n ip6table_nat_exit\n xt_unregister_template\n\tkfree(t)\n\t//removed from templ_list\n\t\t\t\t getinfo()\n\t\t\t\t\t t = xt_find_table_lock\n\t\t\t\t\t\tlist_for_each_entry(tmpl, &xt_templates[af]...)\n\t\t\t\t\t\t\tif (strcmp(tmpl->name, name))\n\t\t\t\t\t\t\t\tcontinue; //table not found\n\t\t\t\t\t\t\ttry_module_get\n\t\t\t\t\t\tlist_for_each_entry(t, &xt_net->tables[af]...)\n\t\t\t\t\t\t\treturn t; //not get refcnt\n\t\t\t\t\t module_put(t->me) //uaf\n unregister_pernet_subsys\n //remove table from xt_net list\n\nWhile xt_table module was going away and has been removed from\nxt_templates list, we couldnt get refcnt of xt_table->me. Check\nmodule in xt_net->tables list re-traversal to fix it."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.171", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.116", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.60", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11.7", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12", "versionStartIncluding": "5.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T09:50:04.187Z"}}}, "cveMetadata": {"cveId": "CVE-2024-50257", "state": "PUBLISHED", "dateUpdated": "2025-05-04T09:50:04.187Z", "dateReserved": "2024-10-21T19:36:19.980Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-11-09T10:15:10.373Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/x_tables.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ba22ea01348384df19cc1fabc7964be6e7189749", "status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "versionType": "git"}, {"lessThan": "cb7c388b5967946f097afdb759b7c860305f2d96", "status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "versionType": "git"}, {"lessThan": "6a1f088f9807f5166f58902d26246d0b88da03a8", "status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "versionType": "git"}, {"lessThan": "bab3bb35c03b263c486833d50d50c081d9e9832b", "status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "versionType": "git"}, {"lessThan": "f48d258f0ac540f00fa617dac496c4c18b5dc2fa", "status": "affected", "version": "fdacd57c79b79a03c7ca88f706ad9fb7b46831c1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/x_tables.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.171", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.116", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.60", "versionType": "semver"}, {"lessThanOrEqual": "6.11.*", "status": "unaffected", "version": "6.11.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.12", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "27CA367E-22E6-43BC-9062-CFFE67D00C79", "versionEndExcluding": "5.15.171", "versionStartIncluding": "5.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "43EFDC15-E4D4-4F1E-B70D-62F0854BFDF3", "versionEndExcluding": "6.1.116", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "75088E5E-2400-4D20-915F-7A65C55D9CCD", "versionEndExcluding": "6.6.60", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E96F53A4-5E87-4A70-BD9A-BC327828D57F", "versionEndExcluding": "6.11.7", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*", "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*", "matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*", "matchCriteriaId": "24DBE6C7-2AAE-4818-AED2-E131F153D2FA", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: Fix use-after-free in get_info()\n\nip6table_nat module unload has refcnt warning for UAF. call trace is:\n\nWARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80\nModules linked in: ip6table_nat(-)\nCPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:module_put+0x6f/0x80\nCall Trace:\n <TASK>\n get_info+0x128/0x180\n do_ip6t_get_ctl+0x6a/0x430\n nf_getsockopt+0x46/0x80\n ipv6_getsockopt+0xb9/0x100\n rawv6_getsockopt+0x42/0x190\n do_sock_getsockopt+0xaa/0x180\n __sys_getsockopt+0x70/0xc0\n __x64_sys_getsockopt+0x20/0x30\n do_syscall_64+0xa2/0x1a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nConcurrent execution of module unload and get_info() trigered the warning.\nThe root cause is as follows:\n\ncpu0\t\t\t\t cpu1\nmodule_exit\n//mod->state = MODULE_STATE_GOING\n ip6table_nat_exit\n xt_unregister_template\n\tkfree(t)\n\t//removed from templ_list\n\t\t\t\t getinfo()\n\t\t\t\t\t t = xt_find_table_lock\n\t\t\t\t\t\tlist_for_each_entry(tmpl, &xt_templates[af]...)\n\t\t\t\t\t\t\tif (strcmp(tmpl->name, name))\n\t\t\t\t\t\t\t\tcontinue; //table not found\n\t\t\t\t\t\t\ttry_module_get\n\t\t\t\t\t\tlist_for_each_entry(t, &xt_net->tables[af]...)\n\t\t\t\t\t\t\treturn t; //not get refcnt\n\t\t\t\t\t module_put(t->me) //uaf\n unregister_pernet_subsys\n //remove table from xt_net list\n\nWhile xt_table module was going away and has been removed from\nxt_templates list, we couldnt get refcnt of xt_table->me. Check\nmodule in xt_net->tables list re-traversal to fix it."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: Se corrige el problema use-after-free en la descarga del m\u00f3dulo ip6table_nat get_info() que tiene una advertencia refcnt para UAF. El seguimiento de llamadas es: ADVERTENCIA: CPU: 1 PID: 379 en kernel/module/main.c:853 module_put+0x6f/0x80 M\u00f3dulos vinculados en: ip6table_nat(-) CPU: 1 UID: 0 PID: 379 Comm: ip6tables No contaminado 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:module_put+0x6f/0x80 Seguimiento de llamadas: get_info+0x128/0x180 La ejecuci\u00f3n simult\u00e1nea de la descarga del m\u00f3dulo y get_info() activ\u00f3 la advertencia. La causa ra\u00edz es la siguiente: cpu0 cpu1 module_exit //mod-&gt;state = MODULE_STATE_GOING ip6table_nat_exit xt_unregister_template kfree(t) //eliminado de la lista de plantillas getinfo() t = xt_find_table_lock list_for_each_entry(tmpl, &amp;xt_templates[af]...) if (strcmp(tmpl-&gt;name, name)) continue; //tabla no encontrada try_module_get list_for_each_entry(t, &amp;xt_net-&gt;tables[af]...) return t; //no obtener refcnt module_put(t-&gt;me) //uaf unregister_pernet_subsys //eliminar tabla de la lista xt_net Mientras el m\u00f3dulo xt_table desaparec\u00eda y se eliminaba de la lista xt_templates, no pudimos obtener refcnt de xt_table-&gt;me. Verifique el m\u00f3dulo en el recorrido de lista xt_net-&gt;tables para solucionarlo."}], "id": "CVE-2024-50257", "lastModified": "2026-08-04T11:21:37.863", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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": "nvd@nist.gov", "type": "Primary"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-50257", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-12-11T14:25:40.458302Z", "version": "2.0.3"}}]}, "published": "2024-11-09T11:15:11.340", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6a1f088f9807f5166f58902d26246d0b88da03a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ba22ea01348384df19cc1fabc7964be6e7189749"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bab3bb35c03b263c486833d50d50c081d9e9832b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cb7c388b5967946f097afdb759b7c860305f2d96"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f48d258f0ac540f00fa617dac496c4c18b5dc2fa"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: netfilter: Fix use-after-free in get_info()", "id": "2324861", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2324861"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: Fix use-after-free in get_info()\nip6table_nat module unload has refcnt warning for UAF. call trace is:\nWARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80\nModules linked in: ip6table_nat(-)\nCPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:module_put+0x6f/0x80\nCall Trace:\n<TASK>\nget_info+0x128/0x180\ndo_ip6t_get_ctl+0x6a/0x430\nnf_getsockopt+0x46/0x80\nipv6_getsockopt+0xb9/0x100\nrawv6_getsockopt+0x42/0x190\ndo_sock_getsockopt+0xaa/0x180\n__sys_getsockopt+0x70/0xc0\n__x64_sys_getsockopt+0x20/0x30\ndo_syscall_64+0xa2/0x1a0\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nConcurrent execution of module unload and get_info() trigered the warning.\nThe root cause is as follows:\ncpu0 cpu1\nmodule_exit\n//mod->state = MODULE_STATE_GOING\nip6table_nat_exit\nxt_unregister_template\nkfree(t)\n//removed from templ_list\ngetinfo()\nt = xt_find_table_lock\nlist_for_each_entry(tmpl, &xt_templates[af]...)\nif (strcmp(tmpl->name, name))\ncontinue; //table not found\ntry_module_get\nlist_for_each_entry(t, &xt_net->tables[af]...)\nreturn t; //not get refcnt\nmodule_put(t->me) //uaf\nunregister_pernet_subsys\n//remove table from xt_net list\nWhile xt_table module was going away and has been removed from\nxt_templates list, we couldnt get refcnt of xt_table->me. Check\nmodule in xt_net->tables list re-traversal to fix it."], "name": "CVE-2024-50257", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-11-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50257\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50257\nhttps://lore.kernel.org/linux-cve-announce/2024110939-CVE-2024-50257-af5f@gregkh/T"], "threat_severity": "Moderate"}

{}