{"id":"CVE-2026-89673","revision":"6c4cd6b54f3e46279d80a4413627c3e6","records":[{"revision":"6c4cd6b54f3e46279d80a4413627c3e6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89673","aliases":[],"title":"nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo","description":"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.","state":0,"publishedAt":"2026-09-11T19:45:58.149+00:00","modifiedAt":"2026-10-19T08:50:46.612+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/flexfilelayoutxdr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"efcae97fa425ca6db9d126e37daccf2d7225cb09\",\n                            \"lessThan\": \"88bce7e326c368d7df15126ccac537e54bebd467\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"efcae97fa425ca6db9d126e37daccf2d7225cb09\",\n                            \"lessThan\": \"74015b7be806ad9e21d46f7bd2831df280c6c783\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"efcae97fa425ca6db9d126e37daccf2d7225cb09\",\n                            \"lessThan\": \"41ebca28e17f84293650598f86bd69532ec1a8e0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"efcae97fa425ca6db9d126e37daccf2d7225cb09\",\n                            \"lessThan\": \"62e5949f0dd5ec837af144860ff908369df4c7c9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"efcae97fa425ca6db9d126e37daccf2d7225cb09\",\n                            \"lessThan\": \"8b989aaec85e1293a871d602590c951fe44b8647\",\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\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/nfsd/flexfilelayoutxdr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4.16\",\n                            \"lessThan\": \"6.6.157\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.16\",\n                            \"lessThan\": \"6.12.109\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.16\",\n                            \"lessThan\": \"6.18.50\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.16\",\n                            \"lessThan\": \"7.2.4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.16\",\n                            \"lessThan\": \"7.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/88bce7e326c368d7df15126ccac537e54bebd467","https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783","https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0","https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9","https://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89673","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89673","identifiers":["CVE-2026-89673"]},"retained":false,"historicalAffected":[]}],"coverage":[]}