CVE-2026-63968

CVE CVE-2026-63968EUVD EUVD-2026-45741Published 2026-07-19T14:55:55.000ZLast changed 2026-08-05T12:37:40.000ZCVSS 7.5

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in fib6_select_path() Found while auditing the same pattern Sashiko reported in rt6_fill_node() [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(&first->fib6_siblings) without waiting for RCU readers; first->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &first->fib6_siblings as its terminator. fib6_purge_rt() always WRITE_ONCE()s first->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 6.13; patch: 6.6.143; patch: 6.1.176; 34a949e7a0869dfa31a40416d2a56973fae1807b <0f7b73c3452635de83b8711b31abdda8e49aad7b; patch: 7.1; patch: 0; 6.11.11 <6.12; d9ccb18f83ea2bb654289b6ecf014fd267cc988b <ab9a10969a907b472a0196d999c08ff7144172e3; d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 <3948a7d92f7678e89e1776bb2d169afcad63b1ae; patch: 7.0.12; 6.6.75 <6.6.143; 11edcd026012ac18acee0f1514db3ed1b160fc6f; patch: 6.12.93; patch: 6.18.35; d9ccb18f83ea2bb654289b6ecf014fd267cc988b <9b9d5bd6e3d4c9cecab5407604b690684b2532d2; 6.12.2 <6.12.93; d9ccb18f83ea2bb654289b6ecf014fd267cc988b <9c7da87c2dc860bb17ca1ece942495d28b1ce3b9; 6.1.128 <6.1.176; 52da02521ede55fb86546c3fffd9377b3261b91f <c87cd3cb309634bc8f50a54e2079424f219ac21f

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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