CVE-2025-68788fsnotify: do not generate ACCESS/MODIFY events on child for special files
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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. IN_ACCESS/IN_MODIFY), but they do allow the same user to subscribe for watching events on children when the user has access to the parent directory (e.g. /dev). Users with no read access to a file but with read access to its parent directory can still stat the file and see if it was accessed/modified via atime/mtime change. The same is not true for special files (e.g. /dev/null). Users will not generally observe atime/mtime changes when other users read/write to special files, only when someone sets atime/mtime via utimensat(). Align fsnotify events with this stat behavior and do not generate ACCESS/MODIFY events to parent watchers on read/write of special files. The events are still generated to parent watchers on utimensat(). This closes some side-channels that could be possibly used for information exfiltration [1]. [1] https://snee.la/pdf/pubs/file-notification-attacks.pdf
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 72acc854427948efed7a83da27f7dc3239ac9afc before df2711544b050aba703e6da418c53c7dc5d443ca; from 72acc854427948efed7a83da27f7dc3239ac9afc before 859bdf438f01d9aa7f84b09c1202d548c7cad9e8; 72acc854427948efed7a83da27f7dc3239ac9afc builds before 6a7d7d96eeeab7af2bd01afbb3d9878a11a13d91; from 72acc854427948efed7a83da27f7dc3239ac9afc before e0643d46759db8b84c0504a676043e5e341b6c81; from 72acc854427948efed7a83da27f7dc3239ac9afc before 82f7416bcbd951549e758d15fc1a96a5afc2e900; 72acc854427948efed7a83da27f7dc3239ac9afc builds before 7a93edb23bcf07a3aaf8b598edfc2faa8fbcc0b6; from 72acc854427948efed7a83da27f7dc3239ac9afc before 635bc4def026a24e071436f4f356ea08c0eed6ff | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
References
- https://git.kernel.org/stable/c/df2711544b050aba703e6da418c53c7dc5d443ca
- https://git.kernel.org/stable/c/859bdf438f01d9aa7f84b09c1202d548c7cad9e8
- https://git.kernel.org/stable/c/6a7d7d96eeeab7af2bd01afbb3d9878a11a13d91
- https://git.kernel.org/stable/c/e0643d46759db8b84c0504a676043e5e341b6c81
- https://git.kernel.org/stable/c/82f7416bcbd951549e758d15fc1a96a5afc2e900
- https://git.kernel.org/stable/c/7a93edb23bcf07a3aaf8b598edfc2faa8fbcc0b6
- https://git.kernel.org/stable/c/635bc4def026a24e071436f4f356ea08c0eed6ff
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.