CVE-2025-68788

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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": "72acc854427948efed7a83da27f7dc3239ac9afc", "lessThan": "df2711544b050aba703e6da418c53c7dc5d443ca", "status": "affected", "versionType": "git"}, {"version": "72acc854427948efed7a83da27f7dc3239ac9afc", "lessThan": "859bdf438f01d9aa7f84b09c1202d548c7cad9e8", "status": "affected", "versionType": "git"}, {"version": "72acc854427948efed7a83da27f7dc3239ac9afc", "lessThan": "6a7d7d96eeeab7af2bd01afbb3d9878a11a13d91", "status": "affected", "versionType": "git"}, {"version": "72acc854427948efed7a83da27f7dc3239ac9afc", "lessThan": "e0643d46759db8b84c0504a676043e5e341b6c81", "status": "affected", "versionType": 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"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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-68788", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-16T16:22:25.274360Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-200", "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": 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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"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.248", "versionStartIncluding": "2.6.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.198", "versionStartIncluding": "2.6.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.160", "versionStartIncluding": "2.6.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.120", "versionStartIncluding": "2.6.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.64", "versionStartIncluding": "2.6.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.3", "versionStartIncluding": "2.6.36"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19", "versionStartIncluding": "2.6.36"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:53:22.202Z"}}}, "cveMetadata": {"cveId": "CVE-2025-68788", "state": "PUBLISHED", "dateUpdated": "2026-11-10T12:38:30.831Z", "dateReserved": "2025-12-24T10:30:51.037Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-01-13T15:29:01.270Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/notify/fsnotify.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "df2711544b050aba703e6da418c53c7dc5d443ca", "status": "affected", "version": "72acc854427948efed7a83da27f7dc3239ac9afc", "versionType": "git"}, {"lessThan": "859bdf438f01d9aa7f84b09c1202d548c7cad9e8", "status": "affected", "version": "72acc854427948efed7a83da27f7dc3239ac9afc", "versionType": "git"}, {"lessThan": "6a7d7d96eeeab7af2bd01afbb3d9878a11a13d91", "status": "affected", "version": "72acc854427948efed7a83da27f7dc3239ac9afc", "versionType": "git"}, {"lessThan": "e0643d46759db8b84c0504a676043e5e341b6c81", "status": "affected", "version": "72acc854427948efed7a83da27f7dc3239ac9afc", "versionType": "git"}, {"lessThan": "82f7416bcbd951549e758d15fc1a96a5afc2e900", "status": "affected", "version": "72acc854427948efed7a83da27f7dc3239ac9afc", "versionType": "git"}, {"lessThan": "7a93edb23bcf07a3aaf8b598edfc2faa8fbcc0b6", "status": "affected", "version": "72acc854427948efed7a83da27f7dc3239ac9afc", "versionType": "git"}, {"lessThan": "635bc4def026a24e071436f4f356ea08c0eed6ff", "status": "affected", "version": "72acc854427948efed7a83da27f7dc3239ac9afc", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/notify/fsnotify.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.36"}, {"lessThan": "2.6.36", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.248", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.198", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.160", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.120", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.64", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"affectedData": [{"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "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"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nfsnotify: no generar eventos ACCESS/MODIFY en el hijo para archivos especiales\n\ninotify/fanotify no permiten a los usuarios sin acceso de lectura a un archivo suscribirse a eventos (p. ej., IN_ACCESS/IN_MODIFY), pero s\u00ed permiten al mismo usuario suscribirse para observar eventos en los hijos cuando el usuario tiene acceso al directorio padre (p. ej., /dev).\n\nLos usuarios sin acceso de lectura a un archivo pero con acceso de lectura a su directorio padre a\u00fan pueden hacer stat al archivo y ver si fue accedido/modificado a trav\u00e9s de un cambio en atime/mtime.\n\nLo mismo no es cierto para archivos especiales (p. ej., /dev/null). Los usuarios generalmente no observar\u00e1n cambios en atime/mtime cuando otros usuarios leen/escriben en archivos especiales, solo cuando alguien establece atime/mtime a trav\u00e9s de utimensat().\n\nAlinear los eventos de fsnotify con este comportamiento de stat y no generar eventos ACCESS/MODIFY a los observadores padre en la lectura/escritura de archivos especiales. Los eventos a\u00fan se generan a los observadores padre en utimensat(). Esto cierra algunos canales laterales que podr\u00edan ser posiblemente utilizados para la exfiltraci\u00f3n de informaci\u00f3n [1].\n\n[1] https://snee.la/pdf/pubs/file-notification-attacks.pdf"}], "id": "CVE-2025-68788", "lastModified": "2026-11-10T13:18:00.127", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-68788", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-16T16:22:25.274360Z", "version": "2.0.3"}}]}, "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/859bdf438f01d9aa7f84b09c1202d548c7cad9e8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df2711544b050aba703e6da418c53c7dc5d443ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e0643d46759db8b84c0504a676043e5e341b6c81"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: fsnotify: do not generate ACCESS/MODIFY events on child for special files", "id": "2429061", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429061"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nfsnotify: do not generate ACCESS/MODIFY events on child for special files\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).\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.\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().\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[1] https://snee.la/pdf/pubs/file-notification-attacks.pdf"], "name": "CVE-2025-68788", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68788\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68788\nhttps://lore.kernel.org/linux-cve-announce/2026011303-CVE-2025-68788-05bd@gregkh/T"], "threat_severity": "Low"}

{}