{"id":"CVE-2026-89673","summary":"nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix XDR padding calculation in ff_encode_getdeviceinfo\n\nnfsd4_ff_encode_getdeviceinfo() computes the da_addr_body reservation\nas 16 + netid_len + addr_len, but the subsequent xdr_encode_opaque()\ncalls emit 8 + round_up(netid_len, 4) + round_up(addr_len, 4) bytes.\nThe mismatch means the declared da_addr_body length exceeds the actual\nencoded data by 2-8 bytes on every flexfile GETDEVICEINFO reply,\nleaking stale reply-page content to the client and mis-aligning the\nsubsequent version list decode.\n\nUse xdr_align_size() for each string length to match what\nxdr_encode_opaque() actually writes.","modified":"2026-09-15T03:48:20.971551077Z","published":"2026-09-11T19:45:58.149Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89673.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783"},{"type":"WEB","url":"https://git.kernel.org/stable/c/88bce7e326c368d7df15126ccac537e54bebd467"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89673.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89673"},{"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":"efcae97fa425ca6db9d126e37daccf2d7225cb09"},{"fixed":"88bce7e326c368d7df15126ccac537e54bebd467"},{"fixed":"74015b7be806ad9e21d46f7bd2831df280c6c783"},{"fixed":"41ebca28e17f84293650598f86bd69532ec1a8e0"},{"fixed":"62e5949f0dd5ec837af144860ff908369df4c7c9"},{"fixed":"8b989aaec85e1293a871d602590c951fe44b8647"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89673.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.4.16"},{"fixed":"6.6.157"},{"fixed":"6.12.109"},{"fixed":"6.18.50"},{"fixed":"7.2.4"},{"fixed":"7.3-rc1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89673.json"}}],"schema_version":"1.9.0"}