Answer in brief
CVE-2026-23278 records a High severity (CVSS 7.8) vulnerability in netfilter: nf_tables: always walk all pending catchall elements. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. 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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d60be2da67d172aecf866302c91ea11533eca4d9 <c4d4e86fda707d89eaba80e343321737375f8582 || >=628bd3e49cba1c066228e23d71a852c23e26da73 <4830fb44d12f586f3f544609e086933649a9175a || >=628bd3e49cba1c066228e23d71a852c23e26da73 <eb0948fa13298212c5f8b30ee48efdae4389ab09 || >=628bd3e49cba1c066228e23d71a852c23e26da73 <de47a88c6b807910f05703fb6605f7efdaa11417 || >=628bd3e49cba1c066228e23d71a852c23e26da73 <77c26b5056d693ffe5e9f040e946251cdb55ae55 || >=628bd3e49cba1c066228e23d71a852c23e26da73 <7cb9a23d7ae40a702577d3d8bacb7026f04ac2a9 || bc9f791d2593f17e39f87c6e2b3a36549a3705b1 || 3c7ec098e3b588434a8b07ea9b5b36f04cef1f50 || a136b7942ad2a50de708f76ea299ccb45ac7a7f9 || 25aa2ad37c2162be1c0bc4fe6397f7e4c13f00f8 || dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41 || >=6.1.36 <6.1.177 || >=4.19.316 <4.20 || >=5.4.262 <5.5 || >=5.10.188 <5.11 || >=5.15.121 <5.16 || >=6.3.10 <6.4 | c4d4e86fda707d89eaba80e343321737375f8582, 4830fb44d12f586f3f544609e086933649a9175a, eb0948fa13298212c5f8b30ee48efdae4389ab09, de47a88c6b807910f05703fb6605f7efdaa11417, 77c26b5056d693ffe5e9f040e946251cdb55ae55, 7cb9a23d7ae40a702577d3d8bacb7026f04ac2a9, 6.1.177, 4.20, 5.5, 5.11, 5.16, 6.4 |
| Linux/Linuxgeneric | 6.4 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: always walk all pending catchall elements During transaction processing we might have more than one catchall element: 1 live catchall element and 1 pending element that is coming as part of the new batch. If the map holding the catchall elements is also going away, its required to toggle all catchall elements and not just the first viable candidate. Otherwise, we get: WARNING: ./include/net/netfilter/nf_tables.h:1281 at nft_data_release+0xb7/0xe0 [nf_tables], CPU#2: nft/1404 RIP: 0010:nft_data_release+0xb7/0xe0 [nf_tables] [..] __nft_set_elem_destroy+0x106/0x380 [nf_tables] nf_tables_abort_release+0x348/0x8d0 [nf_tables] nf_tables_abort+0xcf2/0x3ac0 [nf_tables] nfnetlink_rcv_batch+0x9c9/0x20e0 [..]
Quoted source text, attributed separately from HOL analysis.