CVE-2026-89694 (GCVE-0-2026-89694)
Vulnerability from cvelistv5
Published
2026-09-11 19:46
Modified
2026-10-19 08:51
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
Impacted products
Vendor Product Version
Linux Linux Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
Version: ce0887ac96d35c7105090e166bb0807dc0a0e838
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:51:07.514Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35"
        },
        {
          "url": "https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25"
        },
        {
          "url": "https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf"
        }
      ],
      "title": "nfsd: check client ownership when cancelling a copy-notify stateid",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89694",
    "datePublished": "2026-09-11T19:46:13.519Z",
    "dateReserved": "2026-09-11T19:38:34.749Z",
    "dateUpdated": "2026-10-19T08:51:07.514Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.