SB2026090413 - Out-of-bounds write in Linux kernel selinux ss
Published: September 4, 2026
Security Bulletin ID
SB2026090413
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-2026-80755)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform an out-of-bounds heap write.
The vulnerability exists due to an out-of-bounds write in the SELinux policy permission parser when processing a policy image in which a class declares fewer permissions than its largest permission value. A local user can supply a crafted policy containing such a permission declaration to perform an out-of-bounds heap write.
Remediation
Install update from vendor's website.