CVE-2025-38588
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.
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
Product
CWE
Yayın Tarihi
2025-08-19 17:15:36
Güncelleme
2026-01-07 18:44:49
Source Identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
KEV Date Added
-
Kategoriler
Referanslar
https://git.kernel.org/stable/c/3c13db3e47e170bab19e574404e7b6be45ea873d
https://git.kernel.org/stable/c/46aeb66e9e54ed0d56c18615e1c3dbd502b327ab
https://git.kernel.org/stable/c/54e6fe9dd3b0e7c481c2228782c9494d653546da
https://git.kernel.org/stable/c/6d345136c9b875f065d226908a29c25cdf9343f8
https://git.kernel.org/stable/c/cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38
https://git.kernel.org/stable/c/e1b7932af47f92432be8303d2439d1bf77b0be23
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html