What’s Vulnerable › Vulnerabilities

CVE-2026-46150: fanotify: fix false positive on permission events

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-10-19
• Weakness: CWE-863

Description

In the Linux kernel, the following vulnerability has been resolved: fanotify: fix false positive on permission events fsnotify_get_mark_safe() may return false for a mark on an unrelated group, which results in bypassing the permission check. Fix by skipping over detached marks that are not in the current group.

Affected products

• Linux kernel: from 4.12 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30 — fixed in 5.10.258, 5.15.209, 6.1.175, 6.12.88, 6.18.30, 6.6.140

How to fix

Upgrade to a fixed version: Linux kernel 5.10.258, 5.15.209, 6.1.175, 6.12.88. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/04bb66be92f48ed13c3faf1139d892df228789bc
• https://git.kernel.org/stable/c/4a7611ad653785fcdea5ff5f4441e2b7d05b7f11
• https://git.kernel.org/stable/c/7746e3bd4cc19b5092e00d32d676e329bfcb6900
• https://git.kernel.org/stable/c/7baa02b0ae9d17ec5f08836d8ea88ce1927d0678
• https://git.kernel.org/stable/c/895ebbedf88318607c24acc0f591c74b165e1d0a
• https://git.kernel.org/stable/c/a24765332e129c1916d5a6615418b75599b8fcdc
• https://git.kernel.org/stable/c/b7b24b28c8cd55844cab908f4f39dded638d5538
• https://git.kernel.org/stable/c/f130790f1acc8399f32652846c875a251efd040f
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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