{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31597", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.121Z", "datePublished": "2026-04-24T14:42:22.655Z", "dateUpdated": "2026-05-11T22:11:52.105Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:11:52.105Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY\n\nfilemap_fault() may drop the mmap_lock before returning VM_FAULT_RETRY,\nas documented in mm/filemap.c:\n\n \"If our return value has VM_FAULT_RETRY set, it's because the mmap_lock\n may be dropped before doing I/O or by lock_folio_maybe_drop_mmap().\"\n\nWhen this happens, a concurrent munmap() can call remove_vma() and free\nthe vm_area_struct via RCU. The saved 'vma' pointer in ocfs2_fault() then\nbecomes a dangling pointer, and the subsequent trace_ocfs2_fault() call\ndereferences it -- a use-after-free.\n\nFix this by saving ip_blkno as a plain integer before calling\nfilemap_fault(), and removing vma from the trace event. Since\nip_blkno is copied by value before the lock can be dropped, it\nremains valid regardless of what happens to the vma or inode\nafterward."}], "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"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/mmap.c", "fs/ocfs2/ocfs2_trace.h"], "versions": [{"version": "614a9e849ca6ea24843795251cb30af525d5336b", "lessThan": "6f072daefcab1d84ce37c073645615f63be91006", "status": "affected", "versionType": "git"}, {"version": "614a9e849ca6ea24843795251cb30af525d5336b", "lessThan": "4cf2768a0291a0cdd0dae801ea0eafa3878a349d", "status": "affected", "versionType": "git"}, {"version": "614a9e849ca6ea24843795251cb30af525d5336b", "lessThan": "d45ff441b416d4aa1af72b1db23d959601c04da2", "status": "affected", "versionType": "git"}, {"version": "614a9e849ca6ea24843795251cb30af525d5336b", "lessThan": "76a602fdbb78dd05b2da06f74a988cebc97e82d0", "status": "affected", "versionType": "git"}, {"version": "614a9e849ca6ea24843795251cb30af525d5336b", "lessThan": "925bf22c1b823e231b1baea761fe8a1512e442f2", "status": "affected", "versionType": "git"}, {"version": "614a9e849ca6ea24843795251cb30af525d5336b", "lessThan": "7de554cabf160e331e4442e2a9ad874ca9875921", "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/ocfs2/mmap.c", "fs/ocfs2/ocfs2_trace.h"], "versions": [{"version": "2.6.39", "status": "affected"}, {"version": "0", "lessThan": "2.6.39", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.136", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.1", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "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": "2.6.39", "versionEndExcluding": "6.6.136"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "7.0.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "7.1-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6f072daefcab1d84ce37c073645615f63be91006"}, {"url": "https://git.kernel.org/stable/c/4cf2768a0291a0cdd0dae801ea0eafa3878a349d"}, {"url": "https://git.kernel.org/stable/c/d45ff441b416d4aa1af72b1db23d959601c04da2"}, {"url": "https://git.kernel.org/stable/c/76a602fdbb78dd05b2da06f74a988cebc97e82d0"}, {"url": "https://git.kernel.org/stable/c/925bf22c1b823e231b1baea761fe8a1512e442f2"}, {"url": "https://git.kernel.org/stable/c/7de554cabf160e331e4442e2a9ad874ca9875921"}], "title": "ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY", "id": "2461484", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461484"}, "csaw": false, "cwe": "CWE-364", "details": ["A flaw was found in the Linux kernel's OCFS2 (Oracle Cluster File System version 2) component. A local attacker could exploit a use-after-free vulnerability when `filemap_fault()` drops the `mmap_lock` before returning `VM_FAULT_RETRY`. This allows a concurrent `munmap()` operation to free a `vm_area_struct`, leading to `ocfs2_fault()` dereferencing a dangling pointer. This issue can result in system instability or crashes."], "name": "CVE-2026-31597", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31597\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31597\nhttps://lore.kernel.org/linux-cve-announce/2026042417-CVE-2026-31597-79cd@gregkh/T"]}

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