141 lines
7.4 KiB
JSON
141 lines
7.4 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-68226",
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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": "2025-12-16T13:41:40.257Z",
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"datePublished": "2025-12-16T13:57:19.268Z",
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"dateUpdated": "2026-10-15T22:02:48.233Z"
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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": "2026-08-05T12:10:18.178Z"
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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 incomplete backport in cfids_invalidation_worker()\n\nThe previous commit bdb596ceb4b7 (\"smb: client: fix potential UAF in\nsmb2_close_cached_fid()\") was an incomplete backport and missed one\nkref_put() call in cfids_invalidation_worker() that should have been\nconverted to close_cached_dir()."
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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:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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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:N - The vulnerable SMB client path is driven by a remote SMB peer: a malicious server can grant a cached directory lease and then force a session loss and reconnect that reaches the invalidation worker. This requires only network access to the established client connection.\nAC:L - The server controls the lease grant, connection failure or session-expired response, and reconnect timing, while the worker commonly holds the final lease reference. Triggering the lock and preemption imbalance therefore requires no uncontrollable race.\nPR:N - The remote SMB peer needs no privileges on the client and can accept guest or supplied credentials. Although mounting CIFS normally requires victim-side CAP_SYS_ADMIN, that is a deployment and user-interaction prerequisite rather than an attacker privilege.\nUI:R - A victim or administrator must mount or otherwise connect to the SMB share, which can create the cached root-directory handle. The remote peer can subsequently trigger the flaw without further interaction.\nS:U - The vulnerable cached-directory worker and resulting impacts reside within the same Linux kernel security authority. This does not inherently cross a VM, IOMMU, or other security boundary.\nC:H - The unpaired spin unlock can release cfid_list_lock while another CPU owns it, allowing concurrent cached-fid list and lifetime operations to cause use-after-free or heap corruption. Conservatively, that corruption can expose arbitrary kernel memory.\nI:H - Breaking cfid_list_lock serialization permits concurrent list-pointer and object-lifetime writes, potentially producing exploitable kernel heap corruption and control-flow modification. This supports arbitrary modification or kernel code execution.\nA:H - The flaw underflows the worker's preemption state when the final reference is dropped, producing workqueue atomic-state and scheduling failures. It can panic, hang, or otherwise destabilize the kernel and is repeatable by the remote SMB peer."
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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/cached_dir.c"
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],
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"versions": [
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{
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"version": "bdb596ceb4b7c3f28786a33840263728217fbcf5",
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"lessThan": "abd29b6e17a918fdd68352ce4813e167acc8727e",
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"status": "affected",
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"versionType": "git"
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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": "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/cached_dir.c"
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],
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"versions": [
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{
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"version": "6.17.8",
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"lessThan": "6.17.10",
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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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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17.8",
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"versionEndExcluding": "6.17.10"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/abd29b6e17a918fdd68352ce4813e167acc8727e"
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}
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],
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"title": "smb: client: fix incomplete backport in cfids_invalidation_worker()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-68226",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T22:00:27.130563Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T22:02:48.233Z"
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}
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}
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]
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}
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} |