EUVD-2026-64541
GHSA-qhg8-3wmw-3xjv
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Error-path triggering requires specific failure conditions (AC:H); local privilege likely needed to initiate thermal zone registration (PR:L).
Primary rating from Vendor (Linux).
CVSS VectorVendor: Linux
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
5DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
Revert "thermal/drivers/hwmon: Cleanup coding style a bit"
Revert commit 030a48b0f6ce ("thermal/drivers/hwmon: Cleanup coding style a bit") that introduced a use-after-free into the error path of thermal_add_hwmon_sysfs() by removing a valid check from it.
AnalysisAI
Use-after-free in the Linux kernel's thermal/hwmon subsystem exposes local attackers to potential kernel memory corruption across a wide range of stable kernel branches. The flaw was introduced by a cosmetic code-style cleanup commit (030a48b0f6ce) that inadvertently removed a valid guard from the error path of thermal_add_hwmon_sysfs(), allowing a freed object to be referenced when the function fails. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerability is triggered in the error path of thermal_add_hwmon_sysfs(), which is called during thermal zone registration - a code path executed by the kernel in response to hardware enumeration (e.g., ACPI thermal zone discovery) or explicit module loading. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The supplied CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) yields a base score of 8.4, signaling a high-severity local vulnerability with full CIA impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A local user on a vulnerable kernel triggers or waits for the thermal hwmon subsystem to encounter an error during thermal zone registration - for example, by inducing a memory allocation failure or by racing with thermal zone creation/teardown. The use-after-free allows the attacker to read from or write to freed kernel memory, potentially enabling heap manipulation techniques to achieve privilege escalation to root. … |
| Remediation | The primary fix is to update the Linux kernel to a patched stable release: 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9, or any 7.2+ release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify systems running Linux kernel versions 5.15, 6.1, 6.6, 6.12, 6.18, 7.1, or 7.2 and confirm patch availability from your distribution vendor. …
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External POC / Exploit Code
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