Answer in brief
CVE-2026-98320 records a Unknown severity vulnerability in netfilter: flowtable: hold reference on ct until flow is released. 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 | >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <93ff1594be1aad4da364462dd8db050ebcfda2de || >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <eed6997e8dc40593a539fcc722e7ed51b18db86c || >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <61c6688be282277c6e91ab286a7acd0ae8681ac6 || >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <a43cd2b67b91e943273c913237a7a88c50cdcfbc || >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <8274cdc5f9c57e17ed77fc4ba76212536c840f25 || >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <12c1ac230f4ca16e0017b62a963ab75e0b48074f || >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <d9e6175a3ee48209ee65f294fc567b4e16b29b74 || >=0ff90b6c20340e57616a51ae1a1bf18156d6638a <e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d | 93ff1594be1aad4da364462dd8db050ebcfda2de, eed6997e8dc40593a539fcc722e7ed51b18db86c, 61c6688be282277c6e91ab286a7acd0ae8681ac6, a43cd2b67b91e943273c913237a7a88c50cdcfbc, 8274cdc5f9c57e17ed77fc4ba76212536c840f25, 12c1ac230f4ca16e0017b62a963ab75e0b48074f, d9e6175a3ee48209ee65f294fc567b4e16b29b74, e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d |
| Linux/Linuxgeneric | 4.16 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: hold reference on ct until flow is released nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference on ct until flow is released after rcu grace period. Add rcu_barrier() on module exit path, to ensure pending flow entries are release before module goes away.
Quoted source text, attributed separately from HOL analysis.