CVE-2025-38453
kernel: io_uring/msg_ring: ensure io_kiocb freeing is deferred for RCU
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 25, 2025
Updated · July 30, 2026
Description
A use-after-free flaw was found in io_uring/msg_ring in the Linux Kernel. In this flaw io_kiocb freeing is deferred for RCU which can lead to a kernel information leak problem.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-825 · Expired Pointer Dereference