CVE-2022-47946

Name: CVE-2022-47946
Creator: NVD / NIST
Published: 2022-12-23T22:15:08.773+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2022-47946 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An issue was discovered in the Linux kernel 5.10.x before 5.10.155. A use-after-free in io_sqpoll_wait_sq in fs/io_uring.c allows an attacker to crash the kernel, resulting in denial of service. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

An issue was discovered in the Linux kernel 5.10.x before 5.10.155. A use-after-free in io_sqpoll_wait_sq in fs/io_uring.c allows an attacker to crash the kernel, resulting in denial of service. finish_wait can be skipped. An attack can occur in some situations by forking a process and then quickly terminating it. NOTE: later kernel versions, such as the 5.15 longterm series, substantially changed the implementation of io_sqpoll_wait_sq.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.37%

29.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.10, < 5.10.155

References

http://www.openwall.com/lists/oss-security/2022/12/27/1Mailing List, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.161&id=0f544353fec8e717d37724d95b92538e1de79e86Mailing List, Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/12/22/2Exploit, Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/12/27/1Mailing List, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.161&id=0f544353fec8e717d37724d95b92538e1de79e86Mailing List, Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/12/22/2Exploit, Mailing List, Third Party Advisory

Timeline

Published: Dec 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-47946?

How severe is CVE-2022-47946?

CVE-2022-47946 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2022-47946?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-47946?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST