Skip to content
Heist/ feed
Unrated

nfsd: check client ownership when cancelling a copy-notify stateid

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: nfsd: check client ownership when cancelling a copy-notify stateid On the OFFLOAD_CANCEL path (clp != NULL), manage_cpntf_state() freed the target cpntf state without checking ownership. The lookup key st->si_opaque.so_id is allocated cyclically (guessable) and the embedded clientid is the fixed per-net nn->s2s_cp_cl_id, so any authenticated NFSv4.2 client could cancel and free another client's copy-notify stateid. Compare the creating clientid recorded in state->cp_p_clid against the requesting client's cl_clientid and return nfserr_bad_stateid on a mismatch instead of freeing the entry.

Announced Source revision 1
Original source ↗

CVE-2026-89694

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-2026-89694

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": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "81b2cfe767943922eca906a2a5af23a0ce5d0f35",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "6bba72b8ee68ad631b94bd439592cba46de54d7d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "75268f6cfe26b09a7e4d3216367e87fe9e2a26aa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "b1eca07303594ca27f5dc360a6946bd7e1f5b04c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "b42dc26a14b4ad5d6daaada11ec4c70744141c25",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "d801906165cb5cc250d5cbe44935594e170be3e2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
        "lessThan": "6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/nfsd/nfs4state.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.6"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.6",
        "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": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/nfsd/nfs4state.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89694

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#35178 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement