Use-after-free in Linux kernel - CVE-2026-93251
Published: September 25, 2026
Vulnerability identifier: #VU152148
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93251
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to use-after-free in acpi_get_first_physical_node() when obtaining a physical device pointer while acpi_unbind_one() runs concurrently. A local user can invoke get_device() on a stale device pointer to trigger a use-after-free condition.
Affected software
Linux kernel
How to mitigate CVE-2026-93251
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3