7.5

CVE-2026-63968

ipv6: fix possible infinite loop in fib6_select_path()

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
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2
Version < 3948a7d92f7678e89e1776bb2d169afcad63b1ae
Status affected
Version 52da02521ede55fb86546c3fffd9377b3261b91f
Version < c87cd3cb309634bc8f50a54e2079424f219ac21f
Status affected
Version 34a949e7a0869dfa31a40416d2a56973fae1807b
Version < 0f7b73c3452635de83b8711b31abdda8e49aad7b
Status affected
Version d9ccb18f83ea2bb654289b6ecf014fd267cc988b
Version < ab9a10969a907b472a0196d999c08ff7144172e3
Status affected
Version d9ccb18f83ea2bb654289b6ecf014fd267cc988b
Version < 9b9d5bd6e3d4c9cecab5407604b690684b2532d2
Status affected
Version d9ccb18f83ea2bb654289b6ecf014fd267cc988b
Version < 9c7da87c2dc860bb17ca1ece942495d28b1ce3b9
Status affected
Version 11edcd026012ac18acee0f1514db3ed1b160fc6f
Status affected
Version 6.1.128
Version < 6.1.176
Status affected
Version 6.6.75
Version < 6.6.143
Status affected
Version 6.12.2
Version < 6.12.93
Status affected
Version 6.11.11
Version < 6.12
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.13
Status affected
Version 0
Version < 6.13
Status unaffected
Version <= 6.1.*
Version 6.1.176
Status unaffected
Version <= 6.6.*
Version 6.6.143
Status unaffected
Version <= 6.12.*
Version 6.12.93
Status unaffected
Version <= 6.18.*
Version 6.18.35
Status unaffected
Version <= 7.0.*
Version 7.0.12
Status unaffected
Version <= *
Version 7.1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.65% 0.472
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/3948a7d92f7678e89e1776bb2d169afcad63b1ae
https://git.kernel.org/stable/c/c87cd3cb309634bc8f50a54e2079424f219ac21f
https://git.kernel.org/stable/c/0f7b73c3452635de83b8711b31abdda8e49aad7b
https://git.kernel.org/stable/c/ab9a10969a907b472a0196d999c08ff7144172e3
https://git.kernel.org/stable/c/9b9d5bd6e3d4c9cecab5407604b690684b2532d2
https://git.kernel.org/stable/c/9c7da87c2dc860bb17ca1ece942495d28b1ce3b9