Stack-based buffer overflow in Linux kernel - CVE-2026-90358
Published: September 18, 2026
Vulnerability identifier: #VU151130
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-90358
CWE-ID: CWE-121
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-90358
Install security update from vendor's repository.