#VU125854 Use-after-free in Linux kernel - CVE-2026-31426
Published: April 14, 2026
Vulnerability identifier: #VU125854
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31426
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in acpi_ec_space_handler() when handling AML evaluation that accesses an EC OpRegion field after probe deferral leaves a stale handler context. A local user can trigger a sysfs read that causes AML to touch an EC OpRegion to cause a denial of service.
The issue occurs on reduced-hardware EC platforms when the GPIO IRQ provider defers probing.
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/022d1727f33ff90b3e1775125264e3023901952e
- https://git.kernel.org/stable/c/808c0f156f48d5b8ca34088cbbfba8444e606cbc
- https://git.kernel.org/stable/c/9c886e63b69658959633937e3acb7ca8addf7499
- https://git.kernel.org/stable/c/be1a827e15991e874e0d5222d0ea5fdad01960fe
- https://git.kernel.org/stable/c/d04c007047c88158141d9bd5eac761cdadd3782c
- https://git.kernel.org/stable/c/f6484cadbcaf26b5844b51bd7307a663dda48ef6