{"id":"CVE-2025-68788","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-68788","generatedAt":"2026-10-28T00:27:48.852Z","title":"In the Linux kernel, the following vulnerability has been resolved: fsnotify: do not generate ACCESS/MODIFY events on child for special files inotify/fanotify do not allow users with no read access to a file to subscribe to events (e.g.","description":"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","published":"2026-01-13T16:15:59.000Z","lastModified":"2026-10-19T19:17:05.000Z","status":"Deferred","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":["CWE-200"],"affected":[],"epss":{"score":0.00275,"percentile":0.19757,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"references":[{"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":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"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","source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-68788","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}