#VU124189 Use After Free in Linux kernel - CVE-2026-23259
Published: March 20, 2026
Vulnerability identifier: #VU124189
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-2026-23259
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 io_uring/rw component when handling read/write requests. A local user can trigger improper cleanup of allocated iovec structures to cause a denial of service.
Exploitation requires access to the io_uring subsystem and the ability to submit read/write requests.
Remediation
Install security update from vendor's repository.