Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-63969

ipv6: fix possible infinite loop in rt6_fill_node()

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 to < b014a63d2f2c2c767762b548381882dfb1655529affected
  • 52da02521ede55fb86546c3fffd9377b3261b91f to < 279853aec9f58d5cd723e6e5617c1c3337b30383affected
  • 34a949e7a0869dfa31a40416d2a56973fae1807b to < c65b1f60237daac7c56c2652e064cc566a45dc81affected
  • d9ccb18f83ea2bb654289b6ecf014fd267cc988b to < dc36a04621dcc2447dae428709207810b6c06e14affected
  • d9ccb18f83ea2bb654289b6ecf014fd267cc988b to < 5e40de719ee76b8d96e2556ce36dbd3bd07bf37daffected
  • d9ccb18f83ea2bb654289b6ecf014fd267cc988b to < 9f72412bcf60144f252b0d6205106abf14344abcaffected
  • 11edcd026012ac18acee0f1514db3ed1b160fc6faffected
  • 6.1.128 to < 6.1.176affected
  • 6.6.75 to < 6.6.143affected
  • 6.12.2 to < 6.12.93affected
  • 6.11.11 to < 6.12affected

Linux Linux

Default version status: affected

  • 6.13affected
  • 0 to < 6.13unaffected
  • 6.1.176 to ≤ 6.1.*unaffected
  • 6.6.143 to ≤ 6.6.*unaffected
  • 6.12.93 to ≤ 6.12.*unaffected
  • 6.18.35 to ≤ 6.18.*unaffected
  • 7.0.12 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References