CVE-2026-99073ipv4: stop exception dump when nexthop group shrinks
- —Not scoredno CVSS score yet
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 28 days later
· 28 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 4ce5dc9316de50e0da84beafe55d1344f829cece – < f91e472821e32f58b03eb631e20a67157e2b928b
- affected 4ce5dc9316de50e0da84beafe55d1344f829cece – < 21cba134c30c17ae55f468b5809336437df5d7e6
- affected 4ce5dc9316de50e0da84beafe55d1344f829cece – < b9a30bb7b831e8c5a47fadbdf1760918aaf009cc
- affected 4ce5dc9316de50e0da84beafe55d1344f829cece – < 4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2
- affected 6.9
- unaffected < 6.9
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.11 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References4
- https://git.kernel.org/stable/c/f91e472821e32f58b03eb631e20a67157e2b928b (opens in a new tab)
- https://git.kernel.org/stable/c/21cba134c30c17ae55f468b5809336437df5d7e6 (opens in a new tab)
- https://git.kernel.org/stable/c/b9a30bb7b831e8c5a47fadbdf1760918aaf009cc (opens in a new tab)
- https://git.kernel.org/stable/c/4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-108739 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-99073)Record last updated .