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NFSv4/pnfs: key the data server cache on the NFS version

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-90102

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-90102

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "ffb100b0da0e217d5d63ce6fe092f9c29e59f7dd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "02e160922bc83cd25e346a028ed43cbdb0b57e1a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "bc7aa9d8aff826031ffe25eba7f2f3acafcbf7a1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "dd5bd091daa48c6ed8f9235ddf448aa288a0881f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "f2994ba1263d9e88d3d9ae1d097c5cf811d4bfa5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "27f640cd92eebf5c2f64336be7ca24f4636390cb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "bbc975cfb07a146843fde1126c43441e76177539",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d67ae825a59d639e4d8b82413af84d854617a87e",
        "lessThan": "13c23c5cb977f66390795437fd3837887ce1fd75",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/nfs/filelayout/filelayoutdev.c",
      "fs/nfs/flexfilelayout/flexfilelayoutdev.c",
      "fs/nfs/pnfs.h",
      "fs/nfs/pnfs_nfs.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.0",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/nfs/filelayout/filelayoutdev.c",
      "fs/nfs/flexfilelayout/flexfilelayoutdev.c",
      "fs/nfs/pnfs.h",
      "fs/nfs/pnfs_nfs.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90102

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36511 · Revision 1
Added to Heist Feed
Publisher date
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