Answer in brief
CVE-2026-99071 records a Unknown severity vulnerability in ipv4: do not warn on route notification size race. 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 | >=680aea08e78c003292415518ad270bc20f9c80b1 <088ba80eef85fa7a5ad8f9e7c82b403c99242b56 || >=680aea08e78c003292415518ad270bc20f9c80b1 <78a1cf5c54b2f795c81fedb530755a8d01cc84f0 || >=680aea08e78c003292415518ad270bc20f9c80b1 <7dfa7ca97f3ac46353edd4cc44f7733758e4535b || >=680aea08e78c003292415518ad270bc20f9c80b1 <221ef5e1e44a044790f0f54e6aa237883f475a4d || >=680aea08e78c003292415518ad270bc20f9c80b1 <e02a5b6588161673ef75a4bc5cdfb62bd493374d | 088ba80eef85fa7a5ad8f9e7c82b403c99242b56, 78a1cf5c54b2f795c81fedb530755a8d01cc84f0, 7dfa7ca97f3ac46353edd4cc44f7733758e4535b, 221ef5e1e44a044790f0f54e6aa237883f475a4d, e02a5b6588161673ef75a4bc5cdfb62bd493374d |
| Linux/Linuxgeneric | 5.12 | 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: do not warn on route notification size race Commit 680aea08e78c ("net: ipv4: Emit notification when fib hardware flags are changed") added asynchronous route notifications for hardware flag changes. fib_alias_hw_flags_set() sizes the skb with fib_nlmsg_size() and later fills it with fib_dump_info() while holding only RCU. With nexthop compatibility mode enabled, a concurrent replacement can grow the group between these independent snapshots. fib_dump_info() can then legitimately return -EMSGSIZE, so the warning does not prove a sizing bug. Remove the warning. The existing error path still frees the skb and reports the error to listeners.
Quoted source text, attributed separately from HOL analysis.