{"id":"CVE-2026-89669","revision":"58906a7bf0864d51b6a7207e1beee1bd","records":[{"revision":"58906a7bf0864d51b6a7207e1beee1bd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89669","aliases":[],"title":"nfsd: initialize copy-notify stateid before publishing it","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: initialize copy-notify stateid before publishing it\n\nnfsd4_copy_notify() finished initializing the cpntf state after\nnfs4_alloc_init_cpntf_state() had already linked it into the\ns2s_cp_stateids IDR and the parent's sc_cp_list, with cs_count == 1 (the\nmembership reference) and none held for the caller. A racing\nOFFLOAD_CANCEL (crafted cl_id == nn->s2s_cp_cl_id plus the guessable\nso_id) could reach manage_cpntf_state() and free the entry, turning the\ncaller's subsequent cpn_cnr_stateid read and cp_p_stateid/cp_p_clid\nwrites into use-after-free. The owning clientid was also only recorded\nafter publication, so it could not gate an ownership check in that window.\n\nRecord cp_p_stateid and cp_p_clid inside nfs4_alloc_init_cpntf_state()\nbefore nfs4_init_cp_state() publishes the entry, and return it with an\nextra reference. The caller reads the stateid under that reference and\ndrops it with nfs4_put_cpntf_state(); on a late error the laundromat\nreaps the entry.","state":0,"publishedAt":"2026-09-11T19:45:55.111+00:00","modifiedAt":"2026-10-19T08:50:42.637+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/nfs4proc.c\",\n                        \"fs/nfsd/nfs4state.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"863b6e995665472f2af5be2436a874ab6a9e5ac6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"d18d36395d973ef7372c8e6724970585f75b5c0b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"4415a692346a39fdb647cbd717eda510159aaf55\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"9caad13b7cfe9ccb90cc405ac77335800e086595\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"e08a3dcaca0505f861e344a387f37f94d95dbdc2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"a4d7fedcaaf33e60a01e53eafca9041ef966212f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"624322f1adc58acd0b69f77a6ddc764207e97241\",\n                            \"lessThan\": \"129643893b79f8a3c6b72045f933fbab5ee424ca\",\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/nfs4proc.c\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/863b6e995665472f2af5be2436a874ab6a9e5ac6","https://git.kernel.org/stable/c/d18d36395d973ef7372c8e6724970585f75b5c0b","https://git.kernel.org/stable/c/4415a692346a39fdb647cbd717eda510159aaf55","https://git.kernel.org/stable/c/9caad13b7cfe9ccb90cc405ac77335800e086595","https://git.kernel.org/stable/c/e08a3dcaca0505f861e344a387f37f94d95dbdc2","https://git.kernel.org/stable/c/a4d7fedcaaf33e60a01e53eafca9041ef966212f","https://git.kernel.org/stable/c/4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b","https://git.kernel.org/stable/c/129643893b79f8a3c6b72045f933fbab5ee424ca"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89669","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89669","identifiers":["CVE-2026-89669"]},"retained":false,"historicalAffected":[]}],"coverage":[]}