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CVE-2026-80757

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Last modified

CVE-2026-80757 is a vulnerability of currently unknown severity. 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..

Description

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 Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < 2002ff745db64ac83ee1bb9ff78196d2d68bfdb3; >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < 38d91446630a20ce8c2a981810deea81fd61a3b5; >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < 638213f2e6ea52c06a25861616781338d154db35; >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < 2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7; >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < a63011c009ea79439b800a05602b880eb4adbb05; >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < acd5b09be98fd38b7392307880156fb0452a7276; >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < 1b995966c3ae5244751bdaee9bfe7e17567d4fbe; >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7, < 9a82dcd98b6e6e11cfd162410967951f12152528
LinuxLinux2.6.23

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-80757?
Severity scoring for CVE-2026-80757 is pending analysis.
How do I fix CVE-2026-80757?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST