Not yet scoredPublished Oct 23, 2026

CVE-2026-99070ipv6: do not warn on route notification size race

Updated under an hour ago (Oct 27, 2026, 2:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	907eea486888cfe118c19759bbc4b8fca2e004df builds before 8a3b935b6b6037eefb36bd27a60793a008358e8d; 907eea486888cfe118c19759bbc4b8fca2e004df builds before 7b112bd43f1172fb152e848570a957467008a5ae; 907eea486888cfe118c19759bbc4b8fca2e004df builds before 4ac7d92a4698e34e614c254359665b9de1f65283; 907eea486888cfe118c19759bbc4b8fca2e004df builds before 291fe0bafee78c95f9f2e7f579f17793fd5a1e5a; from 907eea486888cfe118c19759bbc4b8fca2e004df before c97426ec649d99596d8969e1a052c16b14b7b485	CNA record

References

References

https://git.kernel.org/stable/c/8a3b935b6b6037eefb36bd27a60793a008358e8d
https://git.kernel.org/stable/c/7b112bd43f1172fb152e848570a957467008a5ae
https://git.kernel.org/stable/c/4ac7d92a4698e34e614c254359665b9de1f65283
https://git.kernel.org/stable/c/291fe0bafee78c95f9f2e7f579f17793fd5a1e5a
https://git.kernel.org/stable/c/c97426ec649d99596d8969e1a052c16b14b7b485

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.