SB20260916136 - Unchecked Return Value in Linux kernel accel ethosu driver
Published: September 16, 2026
Security Bulletin ID
SB20260916136
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Unchecked Return Value (CVE-ID: CVE-2026-89977)
CWE-ID: CWE-252 - Unchecked Return Value
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.