{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68788", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:30:51.037Z", "datePublished": "2026-01-13T15:29:01.270Z", "dateUpdated": "2026-01-13T15:29:01.270Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-01-13T15:29:01.270Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfsnotify: do not generate ACCESS/MODIFY events on child for special files\n\ninotify/fanotify do not allow users with no read access to a file to\nsubscribe to events (e.g. IN_ACCESS/IN_MODIFY), but they do allow the\nsame user to subscribe for watching events on children when the user\nhas access to the parent directory (e.g. /dev).\n\nUsers with no read access to a file but with read access to its parent\ndirectory can still stat the file and see if it was accessed/modified\nvia atime/mtime change.\n\nThe same is not true for special files (e.g. /dev/null). Users will not\ngenerally observe atime/mtime changes when other users read/write to\nspecial files, only when someone sets atime/mtime via utimensat().\n\nAlign fsnotify events with this stat behavior and do not generate\nACCESS/MODIFY events to parent watchers on read/write of special files.\nThe events are still generated to parent watchers on utimensat(). This\ncloses some side-channels that could be possibly used for information\nexfiltration [1].\n\n[1] https://snee.la/pdf/pubs/file-notification-attacks.pdf"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/notify/fsnotify.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6a7d7d96eeeab7af2bd01afbb3d9878a11a13d91", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e0643d46759db8b84c0504a676043e5e341b6c81", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "82f7416bcbd951549e758d15fc1a96a5afc2e900", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7a93edb23bcf07a3aaf8b598edfc2faa8fbcc0b6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "635bc4def026a24e071436f4f356ea08c0eed6ff", "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/notify/fsnotify.c"], "versions": [{"version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.64", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.3", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19-rc2", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.6.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.19-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6a7d7d96eeeab7af2bd01afbb3d9878a11a13d91"}, {"url": "https://git.kernel.org/stable/c/e0643d46759db8b84c0504a676043e5e341b6c81"}, {"url": "https://git.kernel.org/stable/c/82f7416bcbd951549e758d15fc1a96a5afc2e900"}, {"url": "https://git.kernel.org/stable/c/7a93edb23bcf07a3aaf8b598edfc2faa8fbcc0b6"}, {"url": "https://git.kernel.org/stable/c/635bc4def026a24e071436f4f356ea08c0eed6ff"}], "title": "fsnotify: do not generate ACCESS/MODIFY events on child for special files", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfsnotify: do not generate ACCESS/MODIFY events on child for special files\n\ninotify/fanotify do not allow users with no read access to a file to\nsubscribe to events (e.g. IN_ACCESS/IN_MODIFY), but they do allow the\nsame user to subscribe for watching events on children when the user\nhas access to the parent directory (e.g. /dev).\n\nUsers with no read access to a file but with read access to its parent\ndirectory can still stat the file and see if it was accessed/modified\nvia atime/mtime change.\n\nThe same is not true for special files (e.g. /dev/null). Users will not\ngenerally observe atime/mtime changes when other users read/write to\nspecial files, only when someone sets atime/mtime via utimensat().\n\nAlign fsnotify events with this stat behavior and do not generate\nACCESS/MODIFY events to parent watchers on read/write of special files.\nThe events are still generated to parent watchers on utimensat(). This\ncloses some side-channels that could be possibly used for information\nexfiltration [1].\n\n[1] https://snee.la/pdf/pubs/file-notification-attacks.pdf"}], "id": "CVE-2025-68788", "lastModified": "2026-01-13T16:15:58.623", "metrics": {}, "published": "2026-01-13T16:15:58.623", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/635bc4def026a24e071436f4f356ea08c0eed6ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a7d7d96eeeab7af2bd01afbb3d9878a11a13d91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7a93edb23bcf07a3aaf8b598edfc2faa8fbcc0b6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/82f7416bcbd951549e758d15fc1a96a5afc2e900"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e0643d46759db8b84c0504a676043e5e341b6c81"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}