SB2026091868 - Unchecked Return Value in Linux kernel thermal renesas driver
Published: September 18, 2026
Security Bulletin ID
SB2026091868
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-2026-93142)
CWE-ID: CWE-252 - Unchecked Return Value
CVSSv4: 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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper error handling in the rcar_thermal_probe() function when registering a thermal zone during driver probe. A local user can trigger a thermal zone registration failure to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/35bf61798e7d4abf39667d98f298f793b3dd9bbe
- https://git.kernel.org/stable/c/623349a18d4c6e6add7876553c0cb6947c8d92e6
- https://git.kernel.org/stable/c/810875c5996f731961fc5ee1bd24e711f2e8fe78
- https://git.kernel.org/stable/c/a85bcd0c7ef66e3404b3c99e5589c5ea622a757e
- https://git.kernel.org/stable/c/d67607e7749527850619a10d3ed033b02dcea516
- https://git.kernel.org/stable/c/dd04ad1cdabcad51e34b74b4e91b9aeb7180d05d