CVE-2026-46150
Analyzed Analyzed - Analysis Complete
fanotify Permission Check Bypass in Linux Kernel

Publication date: 2026-05-28

Last updated on: 2026-06-09

Assigner: kernel.org

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.
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Meta Information
Published
2026-05-28
Last Modified
2026-06-09
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-46150
EUVD
EUVD-2026-32777
Affected Vendors & Products
Showing 8 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.1
linux linux_kernel From 6.13 (inc) to 6.18.30 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.175 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.209 (exc)
linux linux_kernel From 6.19 (inc) to 7.0.7 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.88 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.140 (exc)
linux linux_kernel From 4.12 (inc) to 5.10.258 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's fanotify subsystem. The function fsnotify_get_mark_safe() may incorrectly return false for a mark that belongs to an unrelated group. This causes the system to bypass permission checks that should normally be enforced.

The issue is fixed by modifying the code to skip over detached marks that are not part of the current group, preventing false positives on permission events.

Impact Analysis

Because the vulnerability allows permission checks to be bypassed, it could potentially let unauthorized users or processes access files or resources they should not have permission to access.

This could lead to unauthorized data access or modification, compromising system security and data integrity.

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