What’s Vulnerable › Vulnerabilities

CVE-2022-47946

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-12-23 · updated 2026-10-14
• Weakness: CWE-416

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.

Affected products

• Linux kernel: from 5.10 before 5.10.155 — fixed in 5.10.155

How to fix

Upgrade to a fixed version: Linux kernel 5.10.155. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2022/12/27/1
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.161&id=0f544353fec8e717d37724d95b92538e1de79e86
• https://www.openwall.com/lists/oss-security/2022/12/22/2
• http://www.openwall.com/lists/oss-security/2022/12/27/1
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.161&id=0f544353fec8e717d37724d95b92538e1de79e86
• https://www.openwall.com/lists/oss-security/2022/12/22/2
• https://cert-portal.siemens.com/productcert/html/ssa-794697.html

Get alerted when CVE-2022-47946 or the next vulnerability affects your stack