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Vulnerability record · CVE-2023-1295 · published 28 June 2023

CVE-2023-1295: Linux kernel toctou race condition vulnerability

Linux · Linux Kernel

A time-of-check to time-of-use issue exists in io_uring subsystem's IORING_OP_CLOSE operation in the Linux kernel's versions 5.6 - 5.11 (inclusive), which allows a local user to elevate their privileges to root. Introduced in b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb, patched in 9eac1904d3364254d622bf2c771c4f85cd435fc2, backported to stable in 788d0824269bef539fe31a785b1517882eafed93.

7.0 CVSS 3.1 High EPSS 0.22% · top 88.7% CWE-367 · TOCTOU race condition
7.0CVSS 3.1 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

A time-of-check to time-of-use issue exists in io_uring subsystem's IORING_OP_CLOSE operation in the Linux kernel's versions 5.6 - 5.11 (inclusive), which allows a local user to elevate their privileges to root. Introduced in b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb, patched in 9eac1904d3364254d622bf2c771c4f85cd435fc2, backported to stable in 788d0824269bef539fe31a785b1517882eafed93.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=788d0824269bef539fe31a785b1517882eafed93 Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9eac1904d3364254d622bf2c771c4f85cd435fc2 Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb Patch
https://kernel.dance/788d0824269bef539fe31a785b1517882eafed93 Patch
https://kernel.dance/9eac1904d3364254d622bf2c771c4f85cd435fc2 Patch
https://security.netapp.com/advisory/ntap-20230731-0006/ Third Party AdvisoryVDB Entry
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=788d0824269bef539fe31a785b1517882eafed93 Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9eac1904d3364254d622bf2c771c4f85cd435fc2 Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb Patch
https://kernel.dance/788d0824269bef539fe31a785b1517882eafed93 Patch
https://kernel.dance/9eac1904d3364254d622bf2c771c4f85cd435fc2 Patch
https://security.netapp.com/advisory/ntap-20230731-0006/ Third Party AdvisoryVDB Entry

Track CVE-2023-1295 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2023-1295), CISA KEV, FIRST EPSS (scores of 2026-10-10). This page is refreshed as NVD updates the record.