{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89673",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.746Z",
        "datePublished": "2026-09-11T19:45:58.149Z",
        "dateUpdated": "2026-10-19T08:50:46.612Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:50:46.612Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/nfsd/flexfilelayoutxdr.c"
                    ],
                    "versions": [
                        {
                            "version": "efcae97fa425ca6db9d126e37daccf2d7225cb09",
                            "lessThan": "88bce7e326c368d7df15126ccac537e54bebd467",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efcae97fa425ca6db9d126e37daccf2d7225cb09",
                            "lessThan": "74015b7be806ad9e21d46f7bd2831df280c6c783",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efcae97fa425ca6db9d126e37daccf2d7225cb09",
                            "lessThan": "41ebca28e17f84293650598f86bd69532ec1a8e0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efcae97fa425ca6db9d126e37daccf2d7225cb09",
                            "lessThan": "62e5949f0dd5ec837af144860ff908369df4c7c9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efcae97fa425ca6db9d126e37daccf2d7225cb09",
                            "lessThan": "8b989aaec85e1293a871d602590c951fe44b8647",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/nfsd/flexfilelayoutxdr.c"
                    ],
                    "versions": [
                        {
                            "version": "6.4.16",
                            "lessThan": "6.6.157",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.16",
                            "lessThan": "6.12.109",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.16",
                            "lessThan": "6.18.50",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.16",
                            "lessThan": "7.2.4",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.16",
                            "lessThan": "7.3",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4.16",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4.16",
                                    "versionEndExcluding": "6.12.109"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4.16",
                                    "versionEndExcluding": "6.18.50"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4.16",
                                    "versionEndExcluding": "7.2.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4.16",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/88bce7e326c368d7df15126ccac537e54bebd467"
                },
                {
                    "url": "https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783"
                },
                {
                    "url": "https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647"
                }
            ],
            "title": "nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}