CVE-2026-90178
kernel: hwmon: (coretemp) Fix core_data leak on CPUs without PTS
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 1, 2026
Description
A flaw was found in the Linux kernel's hwmon coretemp module. On systems with CPUs that do not support X86_FEATURE_PTS, the core_data array, which is allocated to manage temperature data, is not properly released. This memory leak can occur when the coretemp module is loaded and unloaded, potentially leading to system instability or a Denial of Service (DoS) over an extended period due to resource exhaustion.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime