{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98631",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.361Z",
        "datePublished": "2026-10-18T15:19:53.529Z",
        "dateUpdated": "2026-10-19T09:22:59.147Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:22:59.147Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Use a 32-bit compare in xsk_map_gen_lookup\n\nxsk_map_gen_lookup() loads a u32 key and compares it with max_entries\nusing BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a\nmax_entries value of 0x80000000 or higher becomes a threshold larger\nthan every zero-extended 32-bit key. An out-of-range index then skips\nthe bounds check and the generated lookup reads past xsk_map[].\n\nCompare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/xdp/xskmap.c"
                    ],
                    "versions": [
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "c6d5c582d55a8f229d75e98d62eaa065b0deb18d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "227ec890559e922e235eb543646e3bf0bd8269b0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "11d9be35c1f4233798e99be98bc474f83a254c6c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "123f90f394ca404ab8796a7c8072ff7fa5b65a9c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "36461e58f88a1b723f86693f437ac12e60ff4363",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "b5c0cff0c5331582ab01c4c423731453a8381acc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e65650f291ee72fc578d6346080fc4699204ef2c",
                            "lessThan": "70504de0bb627848667207bec7ccfd647deb8814",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/xdp/xskmap.c"
                    ],
                    "versions": [
                        {
                            "version": "5.5",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.5",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.112",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.55",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.9",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.12.112"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "6.18.55"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "7.2.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.5",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c6d5c582d55a8f229d75e98d62eaa065b0deb18d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24"
                },
                {
                    "url": "https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814"
                }
            ],
            "title": "xsk: Use a 32-bit compare in xsk_map_gen_lookup",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}