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CVE-2025-38453

kernel: io_uring/msg_ring: ensure io_kiocb freeing is deferred for RCU

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Severity

Moderate

Red Hat Product Security

7

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 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-825 · Expired Pointer Dereference