Answer in brief
CVE-2026-99070 records a Unknown severity vulnerability in ipv6: 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 | >=907eea486888cfe118c19759bbc4b8fca2e004df <8a3b935b6b6037eefb36bd27a60793a008358e8d || >=907eea486888cfe118c19759bbc4b8fca2e004df <7b112bd43f1172fb152e848570a957467008a5ae || >=907eea486888cfe118c19759bbc4b8fca2e004df <4ac7d92a4698e34e614c254359665b9de1f65283 || >=907eea486888cfe118c19759bbc4b8fca2e004df <291fe0bafee78c95f9f2e7f579f17793fd5a1e5a || >=907eea486888cfe118c19759bbc4b8fca2e004df <c97426ec649d99596d8969e1a052c16b14b7b485 | 8a3b935b6b6037eefb36bd27a60793a008358e8d, 7b112bd43f1172fb152e848570a957467008a5ae, 4ac7d92a4698e34e614c254359665b9de1f65283, 291fe0bafee78c95f9f2e7f579f17793fd5a1e5a, c97426ec649d99596d8969e1a052c16b14b7b485 |
| 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: ipv6: do not warn on route notification size race fib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later fills it with rt6_fill_node(). With nexthop compatibility mode enabled, a concurrent replacement can grow the group between these independent snapshots. rt6_fill_node() 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.