CVE-2026-99070

CVE-2026-99070: vulnerability in Linux

ipv6: do not warn on route notification size race

Published

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/291fe0bafee78c95f9f2e7f579f17793fd5a1e5ahttps://git.kernel.org/stable/c/4ac7d92a4698e34e614c254359665b9de1f65283https://git.kernel.org/stable/c/7b112bd43f1172fb152e848570a957467008a5aehttps://git.kernel.org/stable/c/8a3b935b6b6037eefb36bd27a60793a008358e8dhttps://git.kernel.org/stable/c/c97426ec649d99596d8969e1a052c16b14b7b485