{"id":"CVE-2026-89703","revision":"f0880d5cff334e75b16a4212eea32f9e","records":[{"revision":"f0880d5cff334e75b16a4212eea32f9e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89703","aliases":[],"title":"nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations\n\nnfsd4_drop_revoked_stid() handles FREE_STATEID for admin-revoked\ndelegations but does not set SC_STATUS_FREED before releasing cl_lock.\nrevoke_delegation() uses this flag to detect whether FREE_STATEID has\nalready processed the delegation -- without it, the freed delegation is\nadded to cl_revoked via list_add(), producing a use-after-free when\ncl_revoked is later traversed in __destroy_client().\n\nThe SC_STATUS_REVOKED path in nfsd4_free_stateid() (line 7983) already\nsets SC_STATUS_FREED correctly. Apply the same pattern to the\nSC_STATUS_ADMIN_REVOKED path in nfsd4_drop_revoked_stid().","state":0,"publishedAt":"2026-09-11T19:46:20.28+00:00","modifiedAt":"2026-10-19T08:51:16.319+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\": \"8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a\",\n                            \"lessThan\": \"d832a0587528853d45481d1faf75d4b5d062adaf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a\",\n                            \"lessThan\": \"1e4795766719ffd74b8cf0f2fde4a1350f8326bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a\",\n                            \"lessThan\": \"a6d89032e5c6620d5bb44582a72555ce07bf1c2e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a\",\n                            \"lessThan\": \"650d370cfbc66a96dd14d517bd704689b5bda4e5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"967faa26f313a62e7bebc55d5b8122eaee43b929\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.11.6\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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\": \"6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.12\",\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/d832a0587528853d45481d1faf75d4b5d062adaf","https://git.kernel.org/stable/c/1e4795766719ffd74b8cf0f2fde4a1350f8326bf","https://git.kernel.org/stable/c/a6d89032e5c6620d5bb44582a72555ce07bf1c2e","https://git.kernel.org/stable/c/650d370cfbc66a96dd14d517bd704689b5bda4e5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89703","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89703","identifiers":["CVE-2026-89703"]},"retained":false,"historicalAffected":[]}],"coverage":[]}