CVE-2026-99073
In the Linux kernel, the following vulnerability has been resolved: ipv4: stop exception dump when nexthop group shrinks Commit 4ce5dc9316de ("inet: switch inet_dump_fib() to RCU protection") allowed IPv4 FIB dumps to run concurrently with nexthop replacement. fib_dump_info_fnhe() uses fib_info_num_path() as the loop bound, then fib_info_nhc() independently reloads nh->nh_grp. If RTM_NEWNEXTHOP replaces a group with fewer paths between those loads, fib_info_nhc() returns NULL and the dump dereferences it through nhc_flags. Stop the walk when the indexed path is absent. Nexthop groups are dense, so the current snapshot has no later path.
Affected versions
Linux kernel versions
6.9
and later are affected. Fixed in
6.12.113,
6.18.57,
7.2.11,
7.3
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-99073?
CVE-2026-99073 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.113, 6.18.57, 7.2.11 and others. CVE-2026-99073 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-99073?
Yes. CVE-2026-99073 has been patched. Fixed versions include 6.12.113, 6.18.57, 7.2.11 and others. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-99073 actively exploited?
No. CVE-2026-99073 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.