CVE-2026-63969

CVE CVE-2026-63969EUVD EUVD-2026-45742Published 2026-07-19T14:55:56.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in rt6_fill_node() Sashiko reported this issue [1]. Apply the same fix as commit f8d8ce1b515a ("ipv6: fix possible infinite loop in fib6_info_uses_dev()"). Writers holding tb6_lock can list_del_rcu(&rt->fib6_siblings) without waiting for RCU readers; rt->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &rt->fib6_siblings, causing a CPU stall. fib6_del_route() always WRITE_ONCE()s rt->fib6_nsiblings to 0 before list_del_rcu(), so an inside-loop check is a reliable detach signal. [1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.12.93; 6.6.75 <6.6.143; d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 <b014a63d2f2c2c767762b548381882dfb1655529; 6.13; 6.11.11 <6.12; patch: 6.6.143; 52da02521ede55fb86546c3fffd9377b3261b91f <279853aec9f58d5cd723e6e5617c1c3337b30383; 11edcd026012ac18acee0f1514db3ed1b160fc6f; d9ccb18f83ea2bb654289b6ecf014fd267cc988b <5e40de719ee76b8d96e2556ce36dbd3bd07bf37d; patch: 6.1.176; patch: 6.18.35; d9ccb18f83ea2bb654289b6ecf014fd267cc988b <9f72412bcf60144f252b0d6205106abf14344abc; patch: 7.1; 6.1.128 <6.1.176; 34a949e7a0869dfa31a40416d2a56973fae1807b <c65b1f60237daac7c56c2652e064cc566a45dc81; 6.12.2 <6.12.93; patch: 7.0.12; patch: 0; d9ccb18f83ea2bb654289b6ecf014fd267cc988b <dc36a04621dcc2447dae428709207810b6c06e14

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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