SB2026091857 - Out-of-bounds write in Linux kernel x86 kernel
Published: September 18, 2026
Security Bulletin ID
SB2026091857
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-2026-93164)
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 temporary data in user code.
The vulnerability exists due to improper stack pointer handling in optimized x86 uprobes when executing code with an optimized uprobe. A local user can execute code subject to an optimized uprobe that stores a return address in the x86-64 red zone to corrupt temporary data in user code.
Remediation
Install update from vendor's website.