327 lines
16 KiB
JSON
327 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-35867",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-05-17T13:50:33.107Z",
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"datePublished": "2024-05-19T08:34:25.911Z",
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"dateUpdated": "2026-08-05T11:30:30.460Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:30:30.460Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential UAF in cifs_stats_proc_show()\n\nSkip sessions that are being teared down (status == SES_EXITING) to\navoid UAF."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable code is reached only through a local `read()` on `/proc/fs/cifs/Stats`; no remote peer input drives the vulnerable traversal. The race partner (SMB session teardown) is local mount/umount or per-uid session teardown activity.\nAC:L - The attacker controls both sides — an unprivileged read loop on the world-readable proc file, plus session teardown they can force repeatedly on multiuser/autofs CIFS mounts — and `__cifs_put_smb_ses()` holds the SES_EXITING window open across a blocking SMB LOGOFF round-trip, making the window wide and reliably hit.\nPR:L - `/proc/fs/cifs/Stats` is created mode 0644 in the global, non-namespaced procfs, so any unprivileged local user — including one inside a container with `/proc` mounted — can trigger the vulnerable read path. No capability, and no CIFS mount ownership, is required.\nUI:N - No victim action is needed: the attacker's own access to a multiuser mount creates and tears down per-fsuid SMB sessions, and ordinary background CIFS mount/reconnect/prune activity supplies the teardown otherwise.\nS:U - The use-after-free occurs in kernel memory and its effects stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Contents of the freed `cifs_tcon` — including `tree_name` printed with `%s`, which reads until a NUL and can run past the freed object — are copied into the seq_file buffer returned to the unprivileged reader, yielding a kernel heap disclosure that can be aimed at reallocated sensitive data via heap grooming.\nI:H - A use-after-free of this class gives the attacker influence over the freed slab object's contents, letting dereferenced pointers (`server->ops->print_stats`, tcon list links) be steered by heap spraying into a control-flow/corruption primitive rather than a mere stale read.\nA:H - The confirmed sibling bug produced a general protection fault on slab poison in exactly this traversal, and the oops happens while the global `cifs_tcp_ses_lock` spinlock is held, hanging all subsequent CIFS operations system-wide on top of killing the faulting task."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/client/cifs_debug.c"
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],
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"versions": [
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{
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"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "838ec01ea8d3deb5d123e8ed9022e8162dc3f503",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "bb6570085826291dc392005f9fec16ea5da3c8ad",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "16b7d785775eb03929766819415055e367398f49",
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"status": "affected",
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"status": "affected",
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{
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"lessThan": "0865ffefea197b437ba78b5dd8d8e256253efd65",
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"status": "affected",
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{
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"version": "a67172a013953664b1dad03c648200c70b90506c",
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"status": "affected",
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{
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"version": "3.12.48",
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"lessThan": "3.13",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/client/cifs_debug.c"
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],
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"versions": [
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{
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"version": "3.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.237",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.181",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.85",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.26",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.8.5",
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"lessThanOrEqual": "6.8.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.9",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"id": "CVE-2024-35867",
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"role": "CISA Coordinator",
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