Time-of-check time-of-use (toctou) race condition in Linux kernel - CVE-2023-1295

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Main Vulnerability Database Vulnerabilities #VU92408

Time-of-check time-of-use (toctou) race condition in Linux kernel - CVE-2023-1295

Published: June 28, 2023 / Updated: December 4, 2023


Vulnerability identifier: #VU92408
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-1295
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to time-of-check time-of-use (toctou) race condition error within the io_close_prep(), io_req_defer_prep(), io_issue_sqe() and io_grab_files() functions in fs/io_uring.c. A local user can execute arbitrary code.


Affected software

Linux kernel
openEuler
kernel-devel
bpftool-debuginfo
python3-perf
kernel-debuginfo
kernel-debugsource
kernel-tools-debuginfo
python2-perf
perf-debuginfo
python3-perf-debuginfo
kernel-tools
perf
python2-perf-debuginfo
kernel-tools-devel
kernel-source
kernel
bpftool
kernel-headers

How to mitigate CVE-2023-1295

Install update from vendor's repository.

kernel-devel - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
bpftool-debuginfo - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
python3-perf - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
kernel-debuginfo - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
kernel-debugsource - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
kernel-tools-debuginfo - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
python2-perf - update to 4.19.90-2307.4.0.0210
perf-debuginfo - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
python3-perf-debuginfo - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
kernel-tools - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
perf - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
python2-perf-debuginfo - update to 4.19.90-2307.4.0.0210
kernel-tools-devel - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
kernel-source - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
kernel - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
bpftool - addressed in versions 4.19.90-2307.4.0.0210, 5.10.0-60.103.0.130, 5.10.0-136.41.0.119
kernel-headers - addressed in versions 5.10.0-60.103.0.130, 5.10.0-136.41.0.119

External References

Related Security Bulletins