Memory corruption in Linux kernel - CVE-2026-89905
Published: September 17, 2026
Vulnerability identifier: #VU150381
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-2026-89905
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to improper stack layout handling in the LoongArch BPF JIT prologue and epilogue when compiling BPF programs. A local user can load a BPF program for JIT compilation to cause memory corruption.
Exploitation requires arena_vm_start to be dynamically enabled.
Affected software
Linux kernel
How to mitigate CVE-2026-89905
Install security update from vendor's repository.