SB20260918317 - Stack-based buffer overflow in Linux kernel x86 net
Published: September 18, 2026
Security Bulletin ID
SB20260918317
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) Stack-based buffer overflow (CVE-ID: CVE-2026-90358)
CWE-ID: CWE-121 - Stack-based buffer overflow
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 overwrite adjacent stack slots.
The vulnerability exists due to a stack-based buffer overflow in the x86 BPF trampoline register save area when handling a 128-bit scalar function argument. A local user can trigger a BPF trampoline with a 128-bit scalar argument to overwrite adjacent stack slots.
Remediation
Install update from vendor's website.