Off-by-one in Linux kernel - CVE-2026-89596
Published: September 12, 2026
Vulnerability identifier: #VU149205
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89596
CWE-ID: CWE-193
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an off-by-one error in the forcedeth driver's nv_suspend() and nv_resume() functions when suspending or resuming the system. A local user can trigger a system suspend and resume cycle to cause a denial of service.
On systems built with CONFIG_UBSAN_TRAP=y, the out-of-bounds access aborts the running kernel code.
Affected software
Linux kernel
How to mitigate CVE-2026-89596
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3