Missing release of memory after effective lifetime in Linux kernel - CVE-2026-23263
Published: March 20, 2026
Vulnerability identifier: #VU124185
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23263
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to improper memory management in the io_uring/zcrx component when handling page arrays during sg initialization failure. A local user can trigger a page array leak to disclose sensitive information.
The vulnerability specifically involves failure to release the page array after a previous fix addressed page leaks but left the array un-freed.
How to mitigate CVE-2026-23263
Install security update from vendor's repository.