Use After Free in Linux Kernel
CVE-2020-36694
An issue was discovered in netfilter in the Linux kernel before 5.10. There can be a use-after-free in the packet processing context, because the per-CPU sequence count is mishandled during concurrent iptables rules replacement. This could be exploited with the CAP_NET_ADMIN capability in an unprivileged namespace. NOTE: cc00bca was reverted in 5.12.
Vulnerability class: Use-After-Free
EPSS: 0.004 (36.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Linux_kernel
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Release Notes)
- cve@mitre.org (Patch, Mailing List)
- cve@mitre.org (Exploit, Third Party Advisory)
- cve@mitre.org (Release Notes)
- cve@mitre.org
Frequently asked questions
- What is CVE-2020-36694?
- CVE-2020-36694 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 6.7/10. Published 2023-05-21.
- How severe is CVE-2020-36694?
- Medium severity. CVSS v3 base score is 6.7 out of 10.