CVE-2020-25211: Debian Linux

Medium severity, CVSS 6.0. EPSS: 0.6% chance of exploitation in the next 30 days.

In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 31 only; version 32 only
• Linux Linux Kernel: up to and including 5.8.7

Published 2020-09-09. Last modified 2026-06-17.