Answer in brief
CVE-2026-90102 records a Unknown severity vulnerability in NFSv4/pnfs: key the data server cache on the NFS version. 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 | >=d67ae825a59d639e4d8b82413af84d854617a87e <ffb100b0da0e217d5d63ce6fe092f9c29e59f7dd || >=d67ae825a59d639e4d8b82413af84d854617a87e <02e160922bc83cd25e346a028ed43cbdb0b57e1a || >=d67ae825a59d639e4d8b82413af84d854617a87e <bc7aa9d8aff826031ffe25eba7f2f3acafcbf7a1 || >=d67ae825a59d639e4d8b82413af84d854617a87e <dd5bd091daa48c6ed8f9235ddf448aa288a0881f || >=d67ae825a59d639e4d8b82413af84d854617a87e <f2994ba1263d9e88d3d9ae1d097c5cf811d4bfa5 || >=d67ae825a59d639e4d8b82413af84d854617a87e <27f640cd92eebf5c2f64336be7ca24f4636390cb || >=d67ae825a59d639e4d8b82413af84d854617a87e <bbc975cfb07a146843fde1126c43441e76177539 || >=d67ae825a59d639e4d8b82413af84d854617a87e <13c23c5cb977f66390795437fd3837887ce1fd75 | ffb100b0da0e217d5d63ce6fe092f9c29e59f7dd, 02e160922bc83cd25e346a028ed43cbdb0b57e1a, bc7aa9d8aff826031ffe25eba7f2f3acafcbf7a1, dd5bd091daa48c6ed8f9235ddf448aa288a0881f, f2994ba1263d9e88d3d9ae1d097c5cf811d4bfa5, 27f640cd92eebf5c2f64336be7ca24f4636390cb, bbc975cfb07a146843fde1126c43441e76177539, 13c23c5cb977f66390795437fd3837887ce1fd75 |
| Linux/Linuxgeneric | 4.0 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: NFSv4/pnfs: key the data server cache on the NFS version nfs4_pnfs_ds_add() keys the per-net data server cache on the multipath address set alone, and struct nfs4_pnfs_ds records no version. That suffices for the files layout driver, which always connects with version 4, but flexfiles takes its version tuple from GETDEVICEINFO per device, and one address can legitimately serve both NFSv3 and NFSv4. Two deviceids on one address with different ds_versions[0].version therefore share a single nfs4_pnfs_ds, and whichever mirror connects first pins ds_clp to its own version. The other one is handed that client anyway, so it selects rpc_call_ops for a version the connection does not speak, and the mismatched sequence-slot handling dereferences NULL. Add the version to the cache key so the two cannot alias, giving each version its own nfs4_pnfs_ds and connection while both mirrors stay usable. Only the major version is compared, since that is what selects rpc_call_ops and rpc_ops; v4.0 and v4.1 keep sharing a client. The files layout driver passes the 4 it already hardcodes at connect time.
Quoted source text, attributed separately from HOL analysis.