#VU124928 Use-after-free in Linux kernel - CVE-2026-23443
Published: April 6, 2026
Vulnerability identifier: #VU124928
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-2026-23443
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 attacker to cause a denial of service.
The vulnerability exists due to use-after-free in acpi_processor_errata_piix4() when handling device objects. A local attacker can trigger the vulnerable code path to cause a denial of service.
The issue occurs because device pointers may be dereferenced after references to the corresponding device objects have been dropped.
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/2e369ba9eb7b8a06e9cc35a3e7fe73e59272f8c2
- https://git.kernel.org/stable/c/8583f62259e1b315d5239371adfb36939cdab741
- https://git.kernel.org/stable/c/98473309a36acc271009b85e0bb53a4c0dddf5c2
- https://git.kernel.org/stable/c/bf504b229cb8d534eccbaeaa23eba34c05131e25
- https://git.kernel.org/stable/c/e0c470049344e9346fff79d7e2362212c216665e
- https://git.kernel.org/stable/c/edf4c2aaee08e8fd503fbae705c801e92a0b55d7