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FKIE_CVE-2026-89694

Vulnerability from fkie_nvd - Published: 2026-09-11 20:19 - Updated: 2026-09-14 13:19
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4state.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            },
            {
              "lessThan": "81b2cfe767943922eca906a2a5af23a0ce5d0f35",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            },
            {
              "lessThan": "6bba72b8ee68ad631b94bd439592cba46de54d7d",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            },
            {
              "lessThan": "75268f6cfe26b09a7e4d3216367e87fe9e2a26aa",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            },
            {
              "lessThan": "b1eca07303594ca27f5dc360a6946bd7e1f5b04c",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            },
            {
              "lessThan": "b42dc26a14b4ad5d6daaada11ec4c70744141c25",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            },
            {
              "lessThan": "d801906165cb5cc250d5cbe44935594e170be3e2",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            },
            {
              "lessThan": "6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf",
              "status": "affected",
              "version": "ce0887ac96d35c7105090e166bb0807dc0a0e838",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4state.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: check client ownership when cancelling a copy-notify stateid\n\nOn the OFFLOAD_CANCEL path (clp != NULL), manage_cpntf_state() freed the\ntarget cpntf state without checking ownership. The lookup key\nst-\u003esi_opaque.so_id is allocated cyclically (guessable) and the embedded\nclientid is the fixed per-net nn-\u003es2s_cp_cl_id, so any authenticated\nNFSv4.2 client could cancel and free another client\u0027s copy-notify\nstateid.\n\nCompare the creating clientid recorded in state-\u003ecp_p_clid against the\nrequesting client\u0027s cl_clientid and return nfserr_bad_stateid on a\nmismatch instead of freeing the entry."
    }
  ],
  "id": "CVE-2026-89694",
  "lastModified": "2026-09-14T13:19:19.767",
  "metrics": {},
  "published": "2026-09-11T20:19:56.490",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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