CVE-2026-80757
In the Linux kernel, the following vulnerability has been resolved: selinux: reject a class permission count below its inherited common security_get_permissions() maps an inherited common's permissions into an array sized by the class's own permissions.nprim, but class_read() takes that nprim verbatim from the policy image and never checks that it covers the common. A class that inherits a common of N permissions while declaring a smaller nprim is accepted, and on load the common's permissions are written past the class-sized array -- an out-of-bounds heap write. Reject a class whose permission count is below its inherited common's. Well-formed policies, where the class count already includes the inherited permissions, are unaffected.
Affected versions
Linux kernel versions
2.6.23
and later are affected. Fixed in
5.10.266,
5.15.217,
6.1.184,
6.6.153,
6.12.105,
6.18.46,
7.1.10,
7.2
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-80757?
CVE-2026-80757 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.23 onward and has been patched in 5.10.266, 5.15.217, 6.1.184 and others. CVE-2026-80757 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-80757?
Yes. CVE-2026-80757 has been patched. Fixed versions include 5.10.266, 5.15.217, 6.1.184 and others. If you are running Linux kernel 2.6.23 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-80757 actively exploited?
No. CVE-2026-80757 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.