CVE-2026-99070
Received Received - Intake

Linux Kernel IPv6 Route Notification Race Condition

Publication date: 2026-10-23

Last updated on: 2026-10-23

Assigner: kernel.org

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.

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Meta Information

Published
2026-10-23
Last Modified
2026-10-23
Generated
2026-10-23
EPSS Evaluated
N/A
NVD
CVE-2026-99070
EUVD
EUVD-2026-108736

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
Linux Linux 907eea486888cfe118c19759bbc4b8fca2e004df
Linux Linux 907eea486888cfe118c19759bbc4b8fca2e004df
Linux Linux 907eea486888cfe118c19759bbc4b8fca2e004df
Linux Linux 907eea486888cfe118c19759bbc4b8fca2e004df
Linux Linux 907eea486888cfe118c19759bbc4b8fca2e004df
Linux Linux 5.12

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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