342 lines
17 KiB
JSON
342 lines
17 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-2026-46150",
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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": "2026-05-13T15:03:33.101Z",
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"datePublished": "2026-05-28T09:36:06.494Z",
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"dateUpdated": "2026-10-19T19:36:52.765Z"
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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": "2026-08-05T12:30:03.577Z"
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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\nfanotify: fix false positive on permission events\n\nfsnotify_get_mark_safe() may return false for a mark on an unrelated group,\nwhich results in bypassing the permission check.\n\nFix by skipping over detached marks that are not in the current group."
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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:N",
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"baseScore": 7.1,
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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 runs in the context of a local file operation (open/read/exec) that triggers the fanotify permission event; the attacker bypasses the control by performing local file ops plus churning a local inotify watch. The fully-controllable, reliable attack is local (a remote file-server scenario would lose attacker control of the race).\nAC:L - The attacker controls both sides of the race — the lifecycle of the unrelated (unprivileged inotify) mark and the retried file operation — and each open() is a fresh permission event, so with unlimited retries the bypass is reliably reachable.\nPR:L - Exploitation only needs an unprivileged local account: creating an inotify watch on the parent directory and opening/executing the target file require no capabilities (the privileged CAP_SYS_ADMIN fanotify group is the victim control, not the attacker).\nUI:N - The attacker performs all actions (inotify churn plus repeated file access) with no interaction from any other user.\nS:U - The flaw and its impact are both mediated entirely within the kernel's own access-control path; no boundary to a separately-managed security authority (VM, IOMMU) is crossed.\nC:H - Bypassing FAN_ACCESS_PERM/FAN_OPEN_PERM lets read access to files the policy (AV/sandbox/EDR) would deny proceed; via targeted retries the attacker can force disclosure of chosen protected files, approaching total loss of confidentiality of protected resources.\nI:H - Bypassing FAN_OPEN_PERM/FAN_OPEN_EXEC_PERM lets writes to protected files and execution of binaries the policy would block proceed, allowing modification of protected resources and execution of disallowed code.\nA:N - The bug is fail-open (it only allows operations that should be blocked); it causes no crash, hang, or resource exhaustion, so availability is unaffected."
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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/notify/fsnotify.c",
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"fs/notify/mark.c",
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"include/linux/fsnotify_backend.h"
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],
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{
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "4a7611ad653785fcdea5ff5f4441e2b7d05b7f11",
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"status": "affected",
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},
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{
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"lessThan": "04bb66be92f48ed13c3faf1139d892df228789bc",
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"status": "affected",
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"status": "affected",
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{
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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": "abc77577a669f424c5d0c185b9994f2621c52aa4",
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"status": "affected",
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{
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"status": "affected",
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"versionType": "git"
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{
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"status": "affected",
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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/notify/fsnotify.c",
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"fs/notify/mark.c",
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"include/linux/fsnotify_backend.h"
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],
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"versions": [
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{
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"version": "4.12",
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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": "4.12",
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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": "5.10.258",
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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": "5.15.209",
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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": "6.1.175",
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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": "6.6.140",
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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": "6.12.88",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.30",
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"lessThanOrEqual": "6.18.*",
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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": "7.0.7",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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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{
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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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"url": "https://git.kernel.org/stable/c/4a7611ad653785fcdea5ff5f4441e2b7d05b7f11"
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{
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},
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{
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"url": "https://git.kernel.org/stable/c/895ebbedf88318607c24acc0f591c74b165e1d0a"
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},
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{
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"url": "https://git.kernel.org/stable/c/f130790f1acc8399f32652846c875a251efd040f"
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{
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"url": "https://git.kernel.org/stable/c/7baa02b0ae9d17ec5f08836d8ea88ce1927d0678"
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{
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"url": "https://git.kernel.org/stable/c/b7b24b28c8cd55844cab908f4f39dded638d5538"
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},
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{
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"url": "https://git.kernel.org/stable/c/7746e3bd4cc19b5092e00d32d676e329bfcb6900"
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}
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],
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"title": "fanotify: fix false positive on permission events",
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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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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:20:50.275Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"versionType": "custom"
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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://cert-portal.siemens.com/productcert/html/ssa-784472.html"
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}
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]
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},
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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-2026-46150",
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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": "2026-10-16T15:20:28.641291Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-863",
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"description": "CWE-863 Incorrect Authorization"
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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": "2026-10-19T19:36:52.765Z"
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}
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}
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]
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}
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} |