CVE Database›Document archive›CVE-2021-47123

CVE-2021-47123

kernel: io_uring: fix ltout double free on completion race

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Severity

Moderate

Red Hat Product Security

7.1

CVSS 3.1

Review impact separately from score.

Published · March 15, 2024

Updated · August 5, 2026

Description

A vulnerability was found in io_uring component of the Linux Kernel, where a double free error found due to a race condition in io_link_timeout_fn(). This occurred when a linked timeout was not properly removed from the master request list, leading to potential use-after-free issues and DoS.

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

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

CVSS / CWE

CVSS 3.1 · 7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE-415 · Double Free