CVE-2025-38710

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38710", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.033Z", "datePublished": "2025-09-04T15:33:00.629Z", "dateUpdated": "2026-10-15T22:02:28.235Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:04:10.498Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Validate i_depth for exhash directories\n\nA fuzzer test introduced corruption that ends up with a depth of 0 in\ndir_e_read(), causing an undefined shift by 32 at:\n\n index = hash >> (32 - dip->i_depth);\n\nAs calculated in an open-coded way in dir_make_exhash(), the minimum\ndepth for an exhash directory is ilog2(sdp->sd_hash_ptrs) and 0 is\ninvalid as sdp->sd_hash_ptrs is fixed as sdp->bsize / 16 at mount time.\n\nSo we can avoid the undefined behaviour by checking for depth values\nlower than the minimum in gfs2_dinode_in(). Values greater than the\nmaximum are already being checked for there.\n\nAlso switch the calculation in dir_make_exhash() to use ilog2() to\nclarify how the depth is calculated.\n\nTested with the syzkaller repro.c and xfstests '-g quick'."}], "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 corrupt `di_depth` reaches the kernel only by mounting an attacker-crafted GFS2 volume (loop device, removable media, or a shared cluster LUN), after which the flaw is triggered by ordinary local syscalls (`open`/`stat`/`getdents`) on that mount. GFS2 is a shared-disk filesystem with no network-protocol front end, so there is no remote parser path.\nAC:L - The condition is a deterministic inconsistency the attacker fully authors on disk (`GFS2_DIF_EXHASH` set, `di_depth = 0`, `di_size = 8`), and the out-of-bounds index is chosen exactly by picking a filename whose CRC32 hash equals the desired 32-bit offset. No race, no timing window, and no memory-layout condition outside the attacker's control.\nPR:L - The bare `mount(2)` needs CAP_SYS_ADMIN (gfs2 lacks FS_USERNS_MOUNT), but in the most severe reasonable deployment an unprivileged user gets the crafted volume mounted through udisks2 loop-setup/removable-media automount or `user`/autofs fstab delegation, and the trigger itself \u2014 a path lookup or `getdents` on the bad directory \u2014 requires only basic unprivileged access to the mount.\nUI:N - In the automount/loop-setup scenario the attacker presents the media and initiates the mount themselves, and at the point of exploitation the out-of-bounds read fires from the attacker's own `open()`/`stat()` call. No second user has to take any action.\nS:U - The out-of-bounds access, the wild block read, and the hang all occur in GFS2 code inside the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - `get_leaf_nr()` reads a 64-bit word at `hash + 8*index` where `index` is a fully attacker-chosen 32-bit value and the allocation is 8 bytes \u2014 an unbounded slab out-of-bounds read reaching up to 32 GiB past the object, far beyond a \"few bytes\" bounded read. The value read becomes a block number handed to `gfs2_meta_read()`, giving an observable oracle on kernel heap contents through lookup success/failure and the resulting I/O.\nI:H - Out-of-bounds heap data is promoted to a filesystem block number, and `dir_new_leaf()`/`gfs2_dir_add()` then write directory metadata (`oleaf->lf_next`, `be16_add_cpu(&leaf->lf_entries, 1)`) into the buffer for that attacker-influenced block, so kernel-side data read past the object's bounds steers subsequent metadata writes to arbitrary blocks of the device \u2014 including a shared cluster LUN.\nA:H - A read up to 32 GiB past an 8-byte slab object will typically strike unmapped memory and produce a kernel oops/page fault (KASAN reports it as slab-out-of-bounds), and `dir_e_read()` independently spins forever because `len` truncates to 0 so `index` never advances, wedging `getdents()` while holding the directory glock and stalling the mount \u2014 a full panic on `panic_on_oops` configurations, repeatable on demand."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/gfs2/dir.c", "fs/gfs2/glops.c"], "versions": [{"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "076e992752e4b24178918f748d75597c80a408d2", "status": "affected", "versionType": "git"}, {"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "366183911b153e9b8cf758e1414e1154d7569337", "status": "affected", "versionType": "git"}, {"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "112bb60cd0e254a369e95aa9941a694ffeca089f", "status": "affected", "versionType": "git"}, {"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "cddea0c721106ea480371412d8de21705eb27376", "status": "affected", "versionType": "git"}, {"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "53a0249d68a210c16e961b83adfa82f94ee0a53d", "status": "affected", "versionType": "git"}, {"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "b5f46951e62377b6e406fadc18bc3c5bdf1632a7", "status": "affected", "versionType": "git"}, {"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "9680c58675b82348ab84d387e4fa727f7587e1a0", "status": "affected", "versionType": "git"}, {"version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "557c024ca7250bb65ae60f16c02074106c2f197b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/gfs2/dir.c", "fs/gfs2/glops.c"], "versions": [{"version": "2.6.26", "status": "affected"}, {"version": "0", "lessThan": "2.6.26", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.43", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.11", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.2", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "2.6.26", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.12.43"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.15.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.16.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/076e992752e4b24178918f748d75597c80a408d2"}, {"url": "https://git.kernel.org/stable/c/366183911b153e9b8cf758e1414e1154d7569337"}, {"url": "https://git.kernel.org/stable/c/112bb60cd0e254a369e95aa9941a694ffeca089f"}, {"url": "https://git.kernel.org/stable/c/cddea0c721106ea480371412d8de21705eb27376"}, {"url": "https://git.kernel.org/stable/c/53a0249d68a210c16e961b83adfa82f94ee0a53d"}, {"url": "https://git.kernel.org/stable/c/b5f46951e62377b6e406fadc18bc3c5bdf1632a7"}, {"url": "https://git.kernel.org/stable/c/9680c58675b82348ab84d387e4fa727f7587e1a0"}, {"url": "https://git.kernel.org/stable/c/557c024ca7250bb65ae60f16c02074106c2f197b"}], "title": "gfs2: Validate i_depth for exhash directories", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-38710", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:52:51.698031Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T22:02:28.235Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-38710", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:52:51.698031Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:52:52.275Z"}}], "cna": {"title": "gfs2: Validate i_depth for exhash directories", "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 corrupt `di_depth` reaches the kernel only by mounting an attacker-crafted GFS2 volume (loop device, removable media, or a shared cluster LUN), after which the flaw is triggered by ordinary local syscalls (`open`/`stat`/`getdents`) on that mount. GFS2 is a shared-disk filesystem with no network-protocol front end, so there is no remote parser path.\nAC:L - The condition is a deterministic inconsistency the attacker fully authors on disk (`GFS2_DIF_EXHASH` set, `di_depth = 0`, `di_size = 8`), and the out-of-bounds index is chosen exactly by picking a filename whose CRC32 hash equals the desired 32-bit offset. No race, no timing window, and no memory-layout condition outside the attacker's control.\nPR:L - The bare `mount(2)` needs CAP_SYS_ADMIN (gfs2 lacks FS_USERNS_MOUNT), but in the most severe reasonable deployment an unprivileged user gets the crafted volume mounted through udisks2 loop-setup/removable-media automount or `user`/autofs fstab delegation, and the trigger itself \u2014 a path lookup or `getdents` on the bad directory \u2014 requires only basic unprivileged access to the mount.\nUI:N - In the automount/loop-setup scenario the attacker presents the media and initiates the mount themselves, and at the point of exploitation the out-of-bounds read fires from the attacker's own `open()`/`stat()` call. No second user has to take any action.\nS:U - The out-of-bounds access, the wild block read, and the hang all occur in GFS2 code inside the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - `get_leaf_nr()` reads a 64-bit word at `hash + 8*index` where `index` is a fully attacker-chosen 32-bit value and the allocation is 8 bytes \u2014 an unbounded slab out-of-bounds read reaching up to 32 GiB past the object, far beyond a \"few bytes\" bounded read. The value read becomes a block number handed to `gfs2_meta_read()`, giving an observable oracle on kernel heap contents through lookup success/failure and the resulting I/O.\nI:H - Out-of-bounds heap data is promoted to a filesystem block number, and `dir_new_leaf()`/`gfs2_dir_add()` then write directory metadata (`oleaf->lf_next`, `be16_add_cpu(&leaf->lf_entries, 1)`) into the buffer for that attacker-influenced block, so kernel-side data read past the object's bounds steers subsequent metadata writes to arbitrary blocks of the device \u2014 including a shared cluster LUN.\nA:H - A read up to 32 GiB past an 8-byte slab object will typically strike unmapped memory and produce a kernel oops/page fault (KASAN reports it as slab-out-of-bounds), and `dir_e_read()` independently spins forever because `len` truncates to 0 so `index` never advances, wedging `getdents()` while holding the directory glock and stalling the mount \u2014 a full panic on `panic_on_oops` configurations, repeatable on demand."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "076e992752e4b24178918f748d75597c80a408d2", "versionType": "git"}, {"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "366183911b153e9b8cf758e1414e1154d7569337", "versionType": "git"}, {"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "112bb60cd0e254a369e95aa9941a694ffeca089f", "versionType": "git"}, {"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "cddea0c721106ea480371412d8de21705eb27376", "versionType": "git"}, {"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "53a0249d68a210c16e961b83adfa82f94ee0a53d", "versionType": "git"}, {"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "b5f46951e62377b6e406fadc18bc3c5bdf1632a7", "versionType": "git"}, {"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "9680c58675b82348ab84d387e4fa727f7587e1a0", "versionType": "git"}, {"status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "lessThan": "557c024ca7250bb65ae60f16c02074106c2f197b", "versionType": "git"}], "programFiles": ["fs/gfs2/dir.c", "fs/gfs2/glops.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.26"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.26", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.134", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.43", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.15.11", "versionType": "semver", "lessThanOrEqual": "6.15.*"}, {"status": "unaffected", "version": "6.16.2", "versionType": "semver", "lessThanOrEqual": "6.16.*"}, {"status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/gfs2/dir.c", "fs/gfs2/glops.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/076e992752e4b24178918f748d75597c80a408d2"}, {"url": "https://git.kernel.org/stable/c/366183911b153e9b8cf758e1414e1154d7569337"}, {"url": "https://git.kernel.org/stable/c/112bb60cd0e254a369e95aa9941a694ffeca089f"}, {"url": "https://git.kernel.org/stable/c/cddea0c721106ea480371412d8de21705eb27376"}, {"url": "https://git.kernel.org/stable/c/53a0249d68a210c16e961b83adfa82f94ee0a53d"}, {"url": "https://git.kernel.org/stable/c/b5f46951e62377b6e406fadc18bc3c5bdf1632a7"}, {"url": "https://git.kernel.org/stable/c/9680c58675b82348ab84d387e4fa727f7587e1a0"}, {"url": "https://git.kernel.org/stable/c/557c024ca7250bb65ae60f16c02074106c2f197b"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Validate i_depth for exhash directories\n\nA fuzzer test introduced corruption that ends up with a depth of 0 in\ndir_e_read(), causing an undefined shift by 32 at:\n\n index = hash >> (32 - dip->i_depth);\n\nAs calculated in an open-coded way in dir_make_exhash(), the minimum\ndepth for an exhash directory is ilog2(sdp->sd_hash_ptrs) and 0 is\ninvalid as sdp->sd_hash_ptrs is fixed as sdp->bsize / 16 at mount time.\n\nSo we can avoid the undefined behaviour by checking for depth values\nlower than the minimum in gfs2_dinode_in(). Values greater than the\nmaximum are already being checked for there.\n\nAlso switch the calculation in dir_make_exhash() to use ilog2() to\nclarify how the depth is calculated.\n\nTested with the syzkaller repro.c and xfstests '-g quick'."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.258", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.209", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.175", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.134", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.43", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.15.11", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.16.2", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.17", "versionStartIncluding": "2.6.26"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:04:10.498Z"}}}, "cveMetadata": {"cveId": "CVE-2025-38710", "state": "PUBLISHED", "dateUpdated": "2026-10-15T22:02:28.235Z", "dateReserved": "2025-04-16T04:51:24.033Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-04T15:33:00.629Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/gfs2/dir.c", "fs/gfs2/glops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "076e992752e4b24178918f748d75597c80a408d2", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}, {"lessThan": "366183911b153e9b8cf758e1414e1154d7569337", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}, {"lessThan": "112bb60cd0e254a369e95aa9941a694ffeca089f", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}, {"lessThan": "cddea0c721106ea480371412d8de21705eb27376", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}, {"lessThan": "53a0249d68a210c16e961b83adfa82f94ee0a53d", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}, {"lessThan": "b5f46951e62377b6e406fadc18bc3c5bdf1632a7", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}, {"lessThan": "9680c58675b82348ab84d387e4fa727f7587e1a0", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}, {"lessThan": "557c024ca7250bb65ae60f16c02074106c2f197b", "status": "affected", "version": "9a0045088d888c9c539c8c626a366cb52c0fbdab", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/gfs2/dir.c", "fs/gfs2/glops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.26"}, {"lessThan": "2.6.26", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.258", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.209", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.175", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.134", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.43", "versionType": "semver"}, {"lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.11", "versionType": "semver"}, {"lessThanOrEqual": "6.16.*", "status": "unaffected", "version": "6.16.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1936DB45-ECC5-4A1A-A924-0D4E14DFE578", "versionEndExcluding": "6.12.43", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BC242347-F722-43AE-B910-BE0B22386977", "versionEndExcluding": "6.15.11", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BD7C087D-2415-4521-B624-30003352F899", "versionEndExcluding": "6.16.2", "versionStartIncluding": "6.16", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: Validate i_depth for exhash directories\n\nA fuzzer test introduced corruption that ends up with a depth of 0 in\ndir_e_read(), causing an undefined shift by 32 at:\n\n index = hash >> (32 - dip->i_depth);\n\nAs calculated in an open-coded way in dir_make_exhash(), the minimum\ndepth for an exhash directory is ilog2(sdp->sd_hash_ptrs) and 0 is\ninvalid as sdp->sd_hash_ptrs is fixed as sdp->bsize / 16 at mount time.\n\nSo we can avoid the undefined behaviour by checking for depth values\nlower than the minimum in gfs2_dinode_in(). Values greater than the\nmaximum are already being checked for there.\n\nAlso switch the calculation in dir_make_exhash() to use ilog2() to\nclarify how the depth is calculated.\n\nTested with the syzkaller repro.c and xfstests '-g quick'."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\n\ngfs2: Validar i_depth para directorios exhash\n\nUna prueba de fuzzer introdujo corrupci\u00f3n que resulta en una profundidad de 0 en dir_e_read(), causando un desplazamiento indefinido de 32 en:\n\nindex = hash >> (32 - dip->i_depth);\n\nSeg\u00fan se calcula de forma abierta en dir_make_exhash(), la profundidad m\u00ednima para un directorio exhash es ilog2(sdp->sd_hash_ptrs) y 0 no es v\u00e1lido ya que sdp->sd_hash_ptrs se fija como sdp->bsize / 16 en el momento del montaje.\n\nAs\u00ed podemos evitar el comportamiento indefinido comprobando los valores de profundidad inferiores al m\u00ednimo en gfs2_dinode_in(). Los valores mayores que el m\u00e1ximo ya se est\u00e1n comprobando all\u00ed.\n\nTambi\u00e9n cambiar el c\u00e1lculo en dir_make_exhash() para usar ilog2() para clarificar c\u00f3mo se calcula la profundidad.\n\nProbado con syzkaller repro.c y xfstests '-g quick'."}], "id": "CVE-2025-38710", "lastModified": "2026-10-19T21:10:00.160", "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": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-38710", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:52:51.698031Z", "version": "2.0.3"}}]}, "published": "2025-09-04T16:15:40.137", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/076e992752e4b24178918f748d75597c80a408d2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/112bb60cd0e254a369e95aa9941a694ffeca089f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/366183911b153e9b8cf758e1414e1154d7569337"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/53a0249d68a210c16e961b83adfa82f94ee0a53d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/557c024ca7250bb65ae60f16c02074106c2f197b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9680c58675b82348ab84d387e4fa727f7587e1a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b5f46951e62377b6e406fadc18bc3c5bdf1632a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cddea0c721106ea480371412d8de21705eb27376"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: gfs2: Validate i_depth for exhash directories", "id": "2393213", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2393213"}, "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": ["No description is available for this CVE."], "name": "CVE-2025-38710", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "2025-09-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38710\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38710\nhttps://lore.kernel.org/linux-cve-announce/2025090456-CVE-2025-38710-1b60@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-05T14:02:36.064010+00:00", "updated": "2026-08-05T03:30:06.905933+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}