CVE-2026-80757
N/AIn 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 11th percentile
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-80757/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-80757/poc.json
References
Technical & other
- https://git.kernel.org/stable/c/2002ff745db64ac83ee1bb9ff78196d2d68bfdb3
- https://git.kernel.org/stable/c/38d91446630a20ce8c2a981810deea81fd61a3b5
- https://git.kernel.org/stable/c/638213f2e6ea52c06a25861616781338d154db35
- https://git.kernel.org/stable/c/2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7
- https://git.kernel.org/stable/c/a63011c009ea79439b800a05602b880eb4adbb05
- https://git.kernel.org/stable/c/acd5b09be98fd38b7392307880156fb0452a7276
- https://git.kernel.org/stable/c/1b995966c3ae5244751bdaee9bfe7e17567d4fbe
- https://git.kernel.org/stable/c/9a82dcd98b6e6e11cfd162410967951f12152528