Answer in brief
CVE-2026-99073 records a Unknown severity vulnerability in ipv4: stop exception dump when nexthop group shrinks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4ce5dc9316de50e0da84beafe55d1344f829cece <f91e472821e32f58b03eb631e20a67157e2b928b || >=4ce5dc9316de50e0da84beafe55d1344f829cece <21cba134c30c17ae55f468b5809336437df5d7e6 || >=4ce5dc9316de50e0da84beafe55d1344f829cece <b9a30bb7b831e8c5a47fadbdf1760918aaf009cc || >=4ce5dc9316de50e0da84beafe55d1344f829cece <4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2 | f91e472821e32f58b03eb631e20a67157e2b928b, 21cba134c30c17ae55f468b5809336437df5d7e6, b9a30bb7b831e8c5a47fadbdf1760918aaf009cc, 4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2 |
| Linux/Linuxgeneric | 6.9 | Not reported |
Published upstream
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 23, 2026
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.
Quoted source text, attributed separately from HOL analysis.