{"id":"CVE-2026-89694","revision":"64ca7aa28b54424f803c18c172d7d373","records":[{"revision":"64ca7aa28b54424f803c18c172d7d373","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89694","aliases":[],"title":"nfsd: check client ownership when cancelling a copy-notify stateid","description":"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->si_opaque.so_id is allocated cyclically (guessable) and the embedded\nclientid is the fixed per-net nn->s2s_cp_cl_id, so any authenticated\nNFSv4.2 client could cancel and free another client's copy-notify\nstateid.\n\nCompare the creating clientid recorded in state->cp_p_clid against the\nrequesting client's cl_clientid and return nfserr_bad_stateid on a\nmismatch instead of freeing the entry.","state":0,"publishedAt":"2026-09-11T19:46:13.519+00:00","modifiedAt":"2026-10-19T08:51:07.514+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/nfsd/nfs4state.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"81b2cfe767943922eca906a2a5af23a0ce5d0f35\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"6bba72b8ee68ad631b94bd439592cba46de54d7d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"75268f6cfe26b09a7e4d3216367e87fe9e2a26aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"b1eca07303594ca27f5dc360a6946bd7e1f5b04c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"b42dc26a14b4ad5d6daaada11ec4c70744141c25\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"d801906165cb5cc250d5cbe44935594e170be3e2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ce0887ac96d35c7105090e166bb0807dc0a0e838\",\n                            \"lessThan\": \"6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/nfsd/nfs4state.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9","https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35","https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d","https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa","https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c","https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25","https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2","https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89694","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89694","identifiers":["CVE-2026-89694"]},"retained":false,"historicalAffected":[]}],"coverage":[]}