CVE-2026-90102
CVE CVE-2026-90102EUVD EUVD-2026-81695Published 2026-09-17T16:06:12.000ZLast changed 2026-09-18T17:53:00.000ZCVSS 7.5
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux d67ae825a59d639e4d8b82413af84d854617a87e <f2994ba1263d9e88d3d9ae1d097c5cf811d4bfa5; d67ae825a59d639e4d8b82413af84d854617a87e <02e160922bc83cd25e346a028ed43cbdb0b57e1a; d67ae825a59d639e4d8b82413af84d854617a87e <bbc975cfb07a146843fde1126c43441e76177539; patch: 6.18.52; patch: 7.2.6; 4.0; patch: 5.10.270; patch: 0; patch: 7.3-rc1; d67ae825a59d639e4d8b82413af84d854617a87e <ffb100b0da0e217d5d63ce6fe092f9c29e59f7dd; d67ae825a59d639e4d8b82413af84d854617a87e <bc7aa9d8aff826031ffe25eba7f2f3acafcbf7a1; d67ae825a59d639e4d8b82413af84d854617a87e <dd5bd091daa48c6ed8f9235ddf448aa288a0881f; d67ae825a59d639e4d8b82413af84d854617a87e <27f640cd92eebf5c2f64336be7ca24f4636390cb; patch: 6.1.188; patch: 6.12.110; d67ae825a59d639e4d8b82413af84d854617a87e <13c23c5cb977f66390795437fd3837887ce1fd75; patch: 5.15.221; patch: 6.6.157
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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