CVE-2023-1295

kernel: io_uring: TOCTOU vulnerability in IORING_OP_CLOSE operation

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · February 1, 2021

Updated · August 7, 2026

Description

A time-of-check to time-of-use flaw was found in the io_uring subsystem's IORING_OP_CLOSE operation in the Linux kernel. This flaw allows a local user to elevate their privileges to root.

Statement

No Red Hat products are affected by this flaw, as the io_uring subsystem (CONFIG_IO_URING) is not enabled in any shipping kernel release.

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-367 · Time-of-check Time-of-use (TOCTOU) Race Condition