Answer in brief
CVE-2026-98484 records a Unknown severity vulnerability in netfilter: nf_tables: skip expired catchall elements on insert and delete. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=aaa31047a6d25da0fa101da1ed544e1247949b40 <2f07da3881525f7cbfed1ced2796c71a201505b9 || >=aaa31047a6d25da0fa101da1ed544e1247949b40 <12cf803edfffef96f6415f0b5dbc7ec88842ea0f || >=aaa31047a6d25da0fa101da1ed544e1247949b40 <4fb8b1ccc475651e480e509de126bb9ce7f3cff9 || >=aaa31047a6d25da0fa101da1ed544e1247949b40 <70194dc37670bd08e44b471389861cc01bd3a3c9 | 2f07da3881525f7cbfed1ced2796c71a201505b9, 12cf803edfffef96f6415f0b5dbc7ec88842ea0f, 4fb8b1ccc475651e480e509de126bb9ce7f3cff9, 70194dc37670bd08e44b471389861cc01bd3a3c9 |
| Linux/Linuxgeneric | 5.13 | Not reported |
| Linux/Linuxgeneric | >=aaa31047a6d25da0fa101da1ed544e1247949b40 <5e20b39aa7844769a7a782484bc1a809ffbc513e || >=aaa31047a6d25da0fa101da1ed544e1247949b40 <2f07da3881525f7cbfed1ced2796c71a201505b9 || >=aaa31047a6d25da0fa101da1ed544e1247949b40 <12cf803edfffef96f6415f0b5dbc7ec88842ea0f || >=aaa31047a6d25da0fa101da1ed544e1247949b40 <4fb8b1ccc475651e480e509de126bb9ce7f3cff9 || >=aaa31047a6d25da0fa101da1ed544e1247949b40 <70194dc37670bd08e44b471389861cc01bd3a3c9 | 5e20b39aa7844769a7a782484bc1a809ffbc513e, 2f07da3881525f7cbfed1ced2796c71a201505b9, 12cf803edfffef96f6415f0b5dbc7ec88842ea0f, 4fb8b1ccc475651e480e509de126bb9ce7f3cff9, 70194dc37670bd08e44b471389861cc01bd3a3c9 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: skip expired catchall elements on insert and delete nft_setelem_catchall_insert() looks up duplicates with nft_set_elem_active() only, while nft_set_catchall_lookup() and the dump path additionally skip expired elements. Once a catchall element with a timeout expires, this predicate drift makes it invisible to userspace dumps, yet it still blocks re-insertion: with NLM_F_EXCL the request fails with -EEXIST, and without it the request reports success but silently inserts nothing. The stale entry only goes away when the (user-tunable) gc interval elapses, so the catchall rule may silently stop matching for an arbitrarily long time after its first expiration. The delete path shows the same drift: nft_setelem_catchall_deactivate() picks the first active-next entry in the catchall list, so with an expired entry still pending GC it retires the stale entry instead of the fresh one, and it deactivates an element that userspace no longer sees instead of failing with -ENOENT. Align both walks with the lookup and dump predicates: only an element that is active and not expired counts as a duplicate or delete candidate, using the per-netns timestamp taken at transaction start, in line with the set backend .insert/.deactivate and catchall GC sync paths.
Quoted source text, attributed separately from HOL analysis.