{"id":"CVE-2026-89694","summary":"nfsd: check client ownership when cancelling a copy-notify stateid","details":"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's copy-notify\nstateid.\n\nCompare the creating clientid recorded in state-\u003ecp_p_clid against the\nrequesting client's cl_clientid and return nfserr_bad_stateid on a\nmismatch instead of freeing the entry.","modified":"2026-09-13T03:46:56.716703632Z","published":"2026-09-11T19:46:13.519Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89694.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89694.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89694"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ce0887ac96d35c7105090e166bb0807dc0a0e838"},{"fixed":"b1eca07303594ca27f5dc360a6946bd7e1f5b04c"},{"fixed":"b42dc26a14b4ad5d6daaada11ec4c70744141c25"},{"fixed":"d801906165cb5cc250d5cbe44935594e170be3e2"},{"fixed":"6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89694.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.6.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89694.json"}}],"schema_version":"1.9.0"}