🔐 CVE Alert

CVE-2026-63969

UNKNOWN 0.0

ipv6: fix possible infinite loop in rt6_fill_node()

CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th

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

Vendor linux
Product linux
Ecosystems
Industries
Technology
Published Jul 19, 2026
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Affected Versions

Linux / Linux
d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 < b014a63d2f2c2c767762b548381882dfb1655529 52da02521ede55fb86546c3fffd9377b3261b91f < 279853aec9f58d5cd723e6e5617c1c3337b30383 34a949e7a0869dfa31a40416d2a56973fae1807b < c65b1f60237daac7c56c2652e064cc566a45dc81 d9ccb18f83ea2bb654289b6ecf014fd267cc988b < dc36a04621dcc2447dae428709207810b6c06e14 d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 5e40de719ee76b8d96e2556ce36dbd3bd07bf37d d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 9f72412bcf60144f252b0d6205106abf14344abc 11edcd026012ac18acee0f1514db3ed1b160fc6f 6.1.128 < 6.1.176 6.6.75 < 6.6.143 6.12.2 < 6.12.93 6.11.11 < 6.12
Linux / Linux
6.13

References

NVD ↗ CVE.org ↗ EPSS Data ↗
git.kernel.org: https://git.kernel.org/stable/c/b014a63d2f2c2c767762b548381882dfb1655529 git.kernel.org: https://git.kernel.org/stable/c/279853aec9f58d5cd723e6e5617c1c3337b30383 git.kernel.org: https://git.kernel.org/stable/c/c65b1f60237daac7c56c2652e064cc566a45dc81 git.kernel.org: https://git.kernel.org/stable/c/dc36a04621dcc2447dae428709207810b6c06e14 git.kernel.org: https://git.kernel.org/stable/c/5e40de719ee76b8d96e2556ce36dbd3bd07bf37d git.kernel.org: https://git.kernel.org/stable/c/9f72412bcf60144f252b0d6205106abf14344abc