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CVE-2023-52654

HighPublished

io_uring/af_unix: disable sending io_uring over sockets

Published: May 9, 2024
Updated: Aug 5, 2026
Assigning CNA: Linux
Evidence observed: Aug 5, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.9%

Low · next 30 days

Percentile: 57.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring/af_unix: disable sending io_uring over sockets File reference cycles have caused lots of problems for io_uring in the past, and it still doesn't work exactly right and races with unix_stream_read_generic(). The safest fix would be to completely disallow sending io_uring files via sockets via SCM_RIGHT, so there are no possible cycles invloving registered files and thus rendering SCM accounting on the io_uring side unnecessary.

Sources

CVE-2023-52654Exploit
Automated privilege escalation script exploiting misconfigured setuid/sgid binaries, sudo, cron, and LD_PRELOAD on Unix systems. Designed for CTF and penetration testing, with no third-party dependencies.

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