{"id":"CVE-2026-89701","summary":"nfsd: validate nseconds in TIME_DELEG decode paths","details":"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 \u003c 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).","modified":"2026-09-13T03:47:20.260993659Z","published":"2026-09-11T19:46:18.807Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89701.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0f4a767340fad392bd656115b8752005518c9065"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5eb489831a9fd4754f4baf26e6989efb66ce104c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e7b93da7fa2e77f977096251899d1410986adf6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89701.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89701"},{"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":"6ae30d6eb26bce02c48c60074b4306270e2434c1"},{"fixed":"7e7b93da7fa2e77f977096251899d1410986adf6"},{"fixed":"5eb489831a9fd4754f4baf26e6989efb66ce104c"},{"fixed":"0f4a767340fad392bd656115b8752005518c9065"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89701.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"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-2026-89701.json"}}],"schema_version":"1.9.0"}