Use After Free in Linux Kernel
CVE-2022-47946
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (30.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2022/12/22/2 (Exploit, Mailing List, Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/ (Patch, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/12/27/1 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-47946?
- CVE-2022-47946 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 5.5/10. Published 2022-12-23.
- How severe is CVE-2022-47946?
- Medium severity. CVSS v3 base score is 5.5 out of 10.