{"cve":"CVE-2026-89694","nvd":{"published":"2026-09-11T20:19:56.490","modified":"2026-10-19T09:18:07.930","status":"Received","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d","https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf","https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa","https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35","https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-89694","score":0.00216,"percentile":0.11973,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}