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CVE-2026-99070

UnknownEPSS 0.17%

Last modified

CVE-2026-99070 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.17%

6.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 907eea486888cfe118c19759bbc4b8fca2e004df, < dac2b0328495971c7b417fd0143e53643343936e; >= 907eea486888cfe118c19759bbc4b8fca2e004df, < 24b2c95a046e15c9504a6d672b6b0b252952493f; >= 907eea486888cfe118c19759bbc4b8fca2e004df, < 8a3b935b6b6037eefb36bd27a60793a008358e8d; >= 907eea486888cfe118c19759bbc4b8fca2e004df, < 7b112bd43f1172fb152e848570a957467008a5ae; >= 907eea486888cfe118c19759bbc4b8fca2e004df, < 4ac7d92a4698e34e614c254359665b9de1f65283; >= 907eea486888cfe118c19759bbc4b8fca2e004df, < 291fe0bafee78c95f9f2e7f579f17793fd5a1e5a; >= 907eea486888cfe118c19759bbc4b8fca2e004df, < c97426ec649d99596d8969e1a052c16b14b7b485
LinuxLinux5.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-99070?
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.
How severe is CVE-2026-99070?
Severity scoring for CVE-2026-99070 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-99070?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST