SB2026091941 - Memory leak in Linux kernel hwmon driver
Published: September 19, 2026
Security Bulletin ID
SB2026091941
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-90178)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a memory leak.
The vulnerability exists due to improper resource release in the coretemp driver when removing a coretemp device on CPUs without package thermal support. A local privileged user can trigger coretemp device removal to cause a memory leak.
Remediation
Install update from vendor's website.