CVE-2026-80757
selinux: reject a class permission count below its inherited common
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.
INFO
Published Date :
Sept. 3, 2026, 1:06 p.m.
Last Modified :
Sept. 3, 2026, 1:06 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the latest version.
- Rebuild and deploy the patched kernel.
- Verify SELinux policy integrity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-80757.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-80757 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-80757
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-80757 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-80757 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 03, 2026
Action Type Old Value New Value Added 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/80xxx/CVE-2026-80757.json">CVE-2026-80757</a> Added Reference https://git.kernel.org/stable/c/1b995966c3ae5244751bdaee9bfe7e17567d4fbe Added Reference https://git.kernel.org/stable/c/2002ff745db64ac83ee1bb9ff78196d2d68bfdb3 Added Reference https://git.kernel.org/stable/c/2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7 Added Reference https://git.kernel.org/stable/c/38d91446630a20ce8c2a981810deea81fd61a3b5 Added Reference https://git.kernel.org/stable/c/638213f2e6ea52c06a25861616781338d154db35 Added Reference https://git.kernel.org/stable/c/9a82dcd98b6e6e11cfd162410967951f12152528 Added Reference https://git.kernel.org/stable/c/a63011c009ea79439b800a05602b880eb4adbb05 Added Reference https://git.kernel.org/stable/c/acd5b09be98fd38b7392307880156fb0452a7276