PT-2026-32352 · Linux · Linux Kernel
CVE-2026-31426
·
Published
2026-04-13
·
Updated
2026-07-21
CVSS v3.1
7.0
High
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free issue exists in the ACPI EC component. When the
ec install handlers() function returns a -EPROBE DEFER error on reduced-hardware platforms, the acpi ec setup() function fails to perform necessary cleanup. This leads the acpi ec add() function to free the struct acpi ec for non-boot instances, leaving a dangling handler context. Subsequent AML evaluations accessing an EC OpRegion field trigger the acpi ec space handler() function using the freed pointer. This can be exercised via unprivileged sysfs reads that cause AML to access EC OpRegions such as battery, thermal, or backlight.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel