SB20261007113 - Out-of-bounds write in Linux kernel include asm
Published: October 7, 2026
Security Bulletin ID
SB20261007113
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-2026-98248)
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:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to corrupt adjacent memory.
The vulnerability exists due to out-of-bounds reads and writes caused by an omitted instruction size suffix in the arm64 per-CPU atomic operations when performing 8-bit or 16-bit operations using LSE instructions. A local user can invoke the affected operations to corrupt adjacent memory.
Remediation
Install update from vendor's website.