Security Flaw in Linux Kernel Affecting SELinux Permissions and Auditing

CVE-2026-53367

What is CVE-2026-53367?

A flaw in the Linux kernel's SELinux subsystem involves the avdcache, where the auditable vector incorrectly reused previous computations. This may lead to critical permissions checks being unsupervised, such as directory writes following earlier cached checks, potentially undermining the security posture of the system. The vulnerability highlights the importance of accurate and timely auditing in maintaining system integrity.

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