CVE-2023-2236

kernel: use-after-free in io_uring/filetable in io_install_fixed_file

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · November 23, 2022

Updated · October 27, 2026

Description

A use-after-free vulnerability was found in io_install_fixed_file in io_uring/filetable.c in the Linux Kernel’s io_uring subsystem. This flaw allows an attacker to achieve local privilege escalation.

Statement

There was no shipped kernel version were seen affected with this problem. These files are not built in our source code.

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 · 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free