Use After Free in Linux
CVE-2021-47232
In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.
Vulnerability class: Use-After-Free
EPSS: 0.002 (15.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions 9d71dd0c70099914fcd063135da3c580865e924c, 5.4, 0
- Linux Linux_kernel — versions 5.13
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2021-47232?
- CVE-2021-47232 is a critical-severity vulnerability in Linux, classified under Use After Free. CVSS score: 9.8/10. Published 2024-05-21.
- How severe is CVE-2021-47232?
- Critical severity. CVSS v3 base score is 9.8 out of 10.