{"id":"CVE-2026-89701","revision":"753e161451634ad2ae2531de47571454","records":[{"revision":"753e161451634ad2ae2531de47571454","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89701","aliases":[],"title":"nfsd: validate nseconds in TIME_DELEG decode paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: validate nseconds in TIME_DELEG decode paths\n\nThe xdrgen-based TIME_DELEG_ACCESS and TIME_DELEG_MODIFY decode arms\nstore a raw uint32_t nseconds directly into tv_nsec without enforcing\nnseconds < NSEC_PER_SEC. The legacy nfsd4_decode_nfstime4 has this\ncheck but the TIME_DELEG paths do not. A malformed timespec can\npropagate through notify_change() to disk.\n\nAdd range checks in both nfs4xdr.c (SETATTR path) and\nnfs4callback.c (CB_GETATTR path).","state":0,"publishedAt":"2026-09-11T19:46:18.807+00:00","modifiedAt":"2026-10-19T08:51:14.339+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/nfs4callback.c\",\n                        \"fs/nfsd/nfs4xdr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6ae30d6eb26bce02c48c60074b4306270e2434c1\",\n                            \"lessThan\": \"7e7b93da7fa2e77f977096251899d1410986adf6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6ae30d6eb26bce02c48c60074b4306270e2434c1\",\n                            \"lessThan\": \"5eb489831a9fd4754f4baf26e6989efb66ce104c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6ae30d6eb26bce02c48c60074b4306270e2434c1\",\n                            \"lessThan\": \"0f4a767340fad392bd656115b8752005518c9065\",\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/nfs4callback.c\",\n                        \"fs/nfsd/nfs4xdr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.14\",\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/7e7b93da7fa2e77f977096251899d1410986adf6","https://git.kernel.org/stable/c/5eb489831a9fd4754f4baf26e6989efb66ce104c","https://git.kernel.org/stable/c/0f4a767340fad392bd656115b8752005518c9065"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89701","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89701","identifiers":["CVE-2026-89701"]},"retained":false,"historicalAffected":[]}],"coverage":[]}