CVE-2026-99070: ipv6: do not warn on route notification size race
Published Oct 23, 2026
·Updated
In the Linux kernel, the following vulnerability has been resolved:
ipv6: do not warn on route notification size race
fib6infohwflagsset() sizes the skb with rt6nlmsgsize() and later fills it with rt6fillnode(). With nexthop compatibility mode enabled, a concurrent replacement can grow the group between these independent snapshots. rt6fillnode() 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 Software
1 affected component
Linux Linux kernel
Event History
Oct 23, 2026
CVE Published
via MITRE·12:23 PM
Data Sourced
via MITRE·12:23 PM
Description