SB20260925225 - Incomplete cleanup in Linux kernel acpi driver
Published: September 25, 2026
Security Bulletin ID
SB20260925225
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incomplete cleanup (CVE-ID: CVE-2026-90364)
CWE-ID: CWE-459 - Incomplete cleanup
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to leave a cpufreq policy notifier registered after ACPI processor driver initialization fails.
The vulnerability exists due to incomplete cleanup in acpi_processor_driver_init() when ACPI processor driver initialization fails after registering the cpufreq policy notifier. A local privileged user can trigger an initialization failure to leave a cpufreq policy notifier registered.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/06f32dd67e6b23a05bef0d8183c5335af91c0c3b
- https://git.kernel.org/stable/c/182cd086b31ea4ccc1d8f2ec5b81e988dfe0b892
- https://git.kernel.org/stable/c/64976f3b34b07eb866ead4052cefe7e9ff45fd2f
- https://git.kernel.org/stable/c/8f3036c5de8b651880f323e223b1604b6cfbff21
- https://git.kernel.org/stable/c/ccee0785030978c49505e04954eee3f30a5f01ca