{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98590",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.358Z",
        "datePublished": "2026-10-18T15:19:02.747Z",
        "dateUpdated": "2026-10-19T09:22:15.786Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:22:15.786Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix bpf_sock context code generation\n\nCurrently, the ctx access code reads the rx_queue_mapping\nfield with either a 4-byte or 2-byte load. The rest of the bits\nin the register are marked known zero by the verifier. However,\nthe emitted ctx access code places in the register on certain\nthe special value (-1) using BPF_MOV_IMM64, which gets sign-extended\nto turn on all the bits in the register. By shifting this value right,\nthe program ends up with a value at runtime above what the verifier\nassumes is possible.\n\nFix this by ensuring the read value is as wide as the assumed size.\nUse MOV32 instructions instead of MOV64 instructions to keep\nthe upper bits zero as assumed by the verifier. Also properly report\nthe size of the destination variable (the bpf_sock field, 4 bytes) instead\nof the source (the socket field, 2 bytes)."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/core/filter.c"
                    ],
                    "versions": [
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "e3ddcf4aeb342d4de2e5761c7042270d454752de",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "4a41d064facc3330e176ecbbf5b0026ed18a5c69",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "70288599d1754e157df8326239316dbdf08ea33c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "ea4dc96c902ccfa49dd3e4f23c443dab4a74b018",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "84ebb991ae985149079ae9ab51b7e3ba25a9ff53",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5",
                            "lessThan": "4a4852376e3a2727ea40e61143d6d7c22bb6dfad",
                            "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/core/filter.c"
                    ],
                    "versions": [
                        {
                            "version": "5.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.8",
                            "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": "5.8",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                },
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                                    "versionStartIncluding": "5.8",
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                                    "versionStartIncluding": "5.8",
                                    "versionEndExcluding": "7.2.9"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.8",
                                    "versionEndExcluding": "7.3"
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                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/e3ddcf4aeb342d4de2e5761c7042270d454752de"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4a41d064facc3330e176ecbbf5b0026ed18a5c69"
                },
                {
                    "url": "https://git.kernel.org/stable/c/70288599d1754e157df8326239316dbdf08ea33c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ea4dc96c902ccfa49dd3e4f23c443dab4a74b018"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/84ebb991ae985149079ae9ab51b7e3ba25a9ff53"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4a4852376e3a2727ea40e61143d6d7c22bb6dfad"
                }
            ],
            "title": "bpf: Fix bpf_sock context code generation",
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}