CVE-2026-53367 selinux: fix avdcache auditing

What is CVE-2026-53367?

CVE-2026-53367 is a medium-severity vulnerability in Linux kernel, published on 19 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

selinux: fix avdcache auditing

The per-task avdcache was incorrectly saving and reusing the audited vector computed by avc_audit_required() rather than recomputing based on the currently requested permissions and distinguishing the denied versus allowed cases. As a result, some permission checks were not being audited, e.g. directory write checks after a previously cached directory search check.

[PM: line wrap tweaks]

Which versions are affected by CVE-2026-53367?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-53367?

Apply the vendor's patch.

Is CVE-2026-53367 being exploited?

There is no known exploitation of CVE-2026-53367 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-53367, DEBIAN-CVE-2026-53367, GHSA-fwgc-423f-pq7g, UBUNTU-CVE-2026-53367.