Unchecked Return Value in Linux kernel - CVE-2026-89977
Published: September 16, 2026
Vulnerability identifier: #VU150311
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89977
CWE-ID: CWE-252
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 unchecked return value in ethosu_probe() when initializing an Ethos-U device after an MMIO mapping failure. A local user can trigger device initialization after an MMIO mapping failure to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89977
Install security update from vendor's repository.