CVE-2026-99073 (GCVE-0-2026-99073)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:23 – Updated: 2026-10-23 12:23
VLAI
Title
ipv4: stop exception dump when nexthop group shrinks
Summary
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6847 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4ce5dc9316de50e0da84beafe55d1344f829cece , < f91e472821e32f58b03eb631e20a67157e2b928b (git)
Affected: 4ce5dc9316de50e0da84beafe55d1344f829cece , < 21cba134c30c17ae55f468b5809336437df5d7e6 (git)
Affected: 4ce5dc9316de50e0da84beafe55d1344f829cece , < b9a30bb7b831e8c5a47fadbdf1760918aaf009cc (git)
Affected: 4ce5dc9316de50e0da84beafe55d1344f829cece , < 4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2 (git)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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          "programFiles": [
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    "dateReserved": "2026-09-25T10:25:14.389Z",
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}



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