SB2026090411 - Out-of-bounds write in Linux kernel selinux ss
Published: September 4, 2026
Security Bulletin ID
SB2026090411
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-80757)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause memory corruption.
The vulnerability exists due to an out-of-bounds heap write in the SELinux security_get_permissions() function when loading a crafted SELinux policy. A local privileged user can load a policy containing a class whose permission count is lower than that of its inherited common to cause memory corruption.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1b995966c3ae5244751bdaee9bfe7e17567d4fbe
- https://git.kernel.org/stable/c/2002ff745db64ac83ee1bb9ff78196d2d68bfdb3
- https://git.kernel.org/stable/c/2b7ffd7921fcbfe408fb7b372e47454e45b1e6a7
- https://git.kernel.org/stable/c/38d91446630a20ce8c2a981810deea81fd61a3b5
- https://git.kernel.org/stable/c/638213f2e6ea52c06a25861616781338d154db35
- https://git.kernel.org/stable/c/9a82dcd98b6e6e11cfd162410967951f12152528
- https://git.kernel.org/stable/c/a63011c009ea79439b800a05602b880eb4adbb05
- https://git.kernel.org/stable/c/acd5b09be98fd38b7392307880156fb0452a7276