CVE-2026-99070 is a vulnerability in Linux Kernel
Published on October 23, 2026
ipv6: do not warn on route notification size race
In the Linux kernel, the following vulnerability has been resolved:
ipv6: do not warn on route notification size race
fib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later
fills it with rt6_fill_node(). With nexthop compatibility mode enabled,
a concurrent replacement can grow the group between these independent
snapshots. rt6_fill_node() can then legitimately return -EMSGSIZE, so
the warning does not prove a sizing bug.
Remove the warning. The existing error path still frees the skb and
reports the error to listeners.
Products Associated with CVE-2026-99070
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 907eea486888cfe118c19759bbc4b8fca2e004df and below 8a3b935b6b6037eefb36bd27a60793a008358e8d is affected.
- Version 907eea486888cfe118c19759bbc4b8fca2e004df and below 7b112bd43f1172fb152e848570a957467008a5ae is affected.
- Version 907eea486888cfe118c19759bbc4b8fca2e004df and below 4ac7d92a4698e34e614c254359665b9de1f65283 is affected.
- Version 907eea486888cfe118c19759bbc4b8fca2e004df and below 291fe0bafee78c95f9f2e7f579f17793fd5a1e5a is affected.
- Version 907eea486888cfe118c19759bbc4b8fca2e004df and below c97426ec649d99596d8969e1a052c16b14b7b485 is affected.
- Version 5.12 is affected.
- Before 5.12 is unaffected.
- Version 6.6.160, <= 6.6.* is unaffected.
- Version 6.12.113, <= 6.12.* is unaffected.
- Version 6.18.57, <= 6.18.* is unaffected.
- Version 7.2.11, <= 7.2.* is unaffected.
- Version 7.3, <= * is unaffected.