CVE-2025-38588
ipv6: prevent infinite loop in rt6_nlmsg_size()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent infinite loop in rt6_nlmsg_size() While testing prior patch, I was able to trigger an infinite loop in rt6_nlmsg_size() in the following place: list_for_each_entry_rcu(sibling, &f6i->fib6_siblings, fib6_siblings) { rt6_nh_nlmsg_size(sibling->fib6_nh, &nexthop_len); } This is because fib6_del_route() and fib6_add_rt2node() uses list_del_rcu(), which can confuse rcu readers, because they might no longer see the head of the list. Restart the loop if f6i->fib6_nsiblings is zero.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 19, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 < 6d345136c9b875f065d226908a29c25cdf9343f8 52da02521ede55fb86546c3fffd9377b3261b91f < e1b7932af47f92432be8303d2439d1bf77b0be23 34a949e7a0869dfa31a40416d2a56973fae1807b < cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38 d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 3c13db3e47e170bab19e574404e7b6be45ea873d d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab d9ccb18f83ea2bb654289b6ecf014fd267cc988b < 54e6fe9dd3b0e7c481c2228782c9494d653546da 11edcd026012ac18acee0f1514db3ed1b160fc6f
Linux / Linux
6.13
References
git.kernel.org: https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8 git.kernel.org: https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23 git.kernel.org: https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38 git.kernel.org: https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d git.kernel.org: https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab git.kernel.org: https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html