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CVE-2022-3910

kernel: Improper update of reference count in io_uring leads to use-after-free

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · September 15, 2022

Updated · October 29, 2026

Description

A use-after-free flaw was found in the io_uring subsystem of the Linux kernel. When io_msg_ring was invoked with a fixed file, it called io_fput_file() which improperly decreased its reference count. This could allow a local user to crash the system or escalate their privileges on the system.

Statement

Red Hat Enterprise Linux is not affected by this flaw as io_uring (CONFIG_IO_URING) is not enabled in any current shipping kernels.

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

No mitigation is specified in collected source.

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-911 · Improper Update of Reference Count