CVE-2026-99073
ipv4: stop exception dump when nexthop group shrinks
No known exploitation. No EPSS score yet. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- LinuxAffected: ≥ 4ce5dc9316de50e0da84beafe55d1344f829cece, < f91e472821e32f58b03eb631e20a67157e2b928bUpgrade to: f91e472821e32f58b03eb631e20a67157e2b928bAffected: ≥ 4ce5dc9316de50e0da84beafe55d1344f829cece, < 21cba134c30c17ae55f468b5809336437df5d7e6Upgrade to: 21cba134c30c17ae55f468b5809336437df5d7e6Affected: ≥ 4ce5dc9316de50e0da84beafe55d1344f829cece, < b9a30bb7b831e8c5a47fadbdf1760918aaf009ccUpgrade to: b9a30bb7b831e8c5a47fadbdf1760918aaf009ccAffected: ≥ 4ce5dc9316de50e0da84beafe55d1344f829cece, < 4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2Upgrade to: 4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
No EPSS score yet. New CVEs are usually scored within a few days.
Lifecycle
2 events over 0 days, from the signal feeds we watch.
- Publishedrecord updated
Affected products
Sources
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