{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98034",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:19:56.070Z",
        "datePublished": "2026-09-25T10:23:49.352Z",
        "dateUpdated": "2026-10-21T12:54:08.478Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:54:08.478Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Mark NULL kptr stores precise\n\ncheck_map_kptr_access() permits a scalar store into an untrusted kptr\nfield only when the register is known to contain zero. Unlike other\nverifier checks whose outcome depends on a scalar value, it does not mark\nthat register precise.\n\nA state checkpoint reached with an imprecise zero can therefore prune a\nsecond path that reaches the store with an arbitrary nonzero scalar. The\nprogram can write attacker-controlled bits into the kptr field and load\nthem back as a PTR_TO_BTF_ID.\n\nCall mark_chain_precision() before accepting a known-zero register. This\nforces state equivalence to compare its scalar range and makes the verifier\nvisit and reject a path carrying a nonzero value."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/bpf/verifier.c"
                    ],
                    "versions": [
                        {
                            "version": "61df10c7799e27807ad5e459eec9d77cddf8bf45",
                            "lessThan": "86a3171c90bfc35a54e9d83cd197ca0d72d2f4e4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61df10c7799e27807ad5e459eec9d77cddf8bf45",
                            "lessThan": "b8b98d3d37908402ff63515fa4d7574235436ea8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61df10c7799e27807ad5e459eec9d77cddf8bf45",
                            "lessThan": "bb667eb575c906f24c707986541a99424c5b07ea",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61df10c7799e27807ad5e459eec9d77cddf8bf45",
                            "lessThan": "86168208737bdd267d92d855d453d1d2f840df19",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "61df10c7799e27807ad5e459eec9d77cddf8bf45",
                            "lessThan": "ecdc5043794c9184aa8e6c814603899479c46b35",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b5a8069835e5236824a84281592d29f859b33153",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.18.18",
                            "lessThan": "5.19",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/bpf/verifier.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.114",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "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": "5.19",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.12.114"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18.18"
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                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/86a3171c90bfc35a54e9d83cd197ca0d72d2f4e4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b8b98d3d37908402ff63515fa4d7574235436ea8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bb667eb575c906f24c707986541a99424c5b07ea"
                },
                {
                    "url": "https://git.kernel.org/stable/c/86168208737bdd267d92d855d453d1d2f840df19"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ecdc5043794c9184aa8e6c814603899479c46b35"
                }
            ],
            "title": "bpf: Mark NULL kptr stores precise",
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}