Answer in brief
CVE-2026-23272 records a High severity (CVSS 7.8) vulnerability in netfilter: nf_tables: unconditionally bump set->nelems before insertion. 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 | >=35d0ac9070ef619e3bf44324375878a1c540387b <25fcaef7948912652905e96922f36583a84fffed || >=35d0ac9070ef619e3bf44324375878a1c540387b <e3ccb11fc8249759d23326038c8db987ddaabc77 || >=35d0ac9070ef619e3bf44324375878a1c540387b <86bc4b1a0f672d47ac19f9022432cb6a2e01cb33 || >=35d0ac9070ef619e3bf44324375878a1c540387b <6826131c7674329335ca25df2550163eb8a1fd0c || >=35d0ac9070ef619e3bf44324375878a1c540387b <ccb8c8f3c1127cf34d18c737309897c68046bf21 || >=35d0ac9070ef619e3bf44324375878a1c540387b <def602e498a4f951da95c95b1b8ce8ae68aa733a || fefdd79403e89b0c673965343b92e2e01e2713a8 || >=4.9.33 <4.10 | 25fcaef7948912652905e96922f36583a84fffed, e3ccb11fc8249759d23326038c8db987ddaabc77, 86bc4b1a0f672d47ac19f9022432cb6a2e01cb33, 6826131c7674329335ca25df2550163eb8a1fd0c, ccb8c8f3c1127cf34d18c737309897c68046bf21, def602e498a4f951da95c95b1b8ce8ae68aa733a, 4.10 |
| Linux/Linuxgeneric | 4.10 | 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: unconditionally bump set->nelems before insertion In case that the set is full, a new element gets published then removed without waiting for the RCU grace period, while RCU reader can be walking over it already. To address this issue, add the element transaction even if set is full, but toggle the set_full flag to report -ENFILE so the abort path safely unwinds the set to its previous state. As for element updates, decrement set->nelems to restore it. A simpler fix is to call synchronize_rcu() in the error path. However, with a large batch adding elements to already maxed-out set, this could cause noticeable slowdown of such batches.
Quoted source text, attributed separately from HOL analysis.