CVE-2026-80755
In the Linux kernel, the following vulnerability has been resolved: selinux: reject a permission value exceeding the class permission count perm_read() bounds a permission value by SEL_VEC_MAX but never by the nprim of the owning class or common, which is taken verbatim from the policy image. security_get_permissions() then writes perms[value - 1] into an nprim-sized kcalloc() array, so a class declaring fewer permissions than its largest permission value drives an out-of-bounds heap write. The top-level symbol tables are validated this way; the nested per-class permission table is not. Reject a permission whose value exceeds nprim, which is already set when perm_read() runs. Well-formed policies are unaffected. [PM: tweak comment for line length]
Affected versions
Linux kernel versions
2.6.23
and later are affected. Fixed in
6.12.108,
6.18.49,
7.1.13,
7.2
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-80755?
CVE-2026-80755 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.23 onward and has been patched in 6.12.108, 6.18.49, 7.1.13 and others. CVE-2026-80755 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-2026-80755?
Yes. CVE-2026-80755 has been patched. Fixed versions include 6.12.108, 6.18.49, 7.1.13 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-2026-80755 actively exploited?
No. CVE-2026-80755 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.