{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43333",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.002Z",
        "datePublished": "2026-05-08T13:31:20.107Z",
        "dateUpdated": "2026-05-23T16:06:46.060Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:06:46.060Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: reject direct access to nullable PTR_TO_BUF pointers\n\ncheck_mem_access() matches PTR_TO_BUF via base_type() which strips\nPTR_MAYBE_NULL, allowing direct dereference without a null check.\n\nMap iterator ctx->key and ctx->value are PTR_TO_BUF | PTR_MAYBE_NULL.\nOn stop callbacks these are NULL, causing a kernel NULL dereference.\n\nAdd a type_may_be_null() guard to the PTR_TO_BUF branch, matching the\nexisting PTR_TO_BTF_ID pattern."
                }
            ],
            "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": "b453361384c2db1c703dacb806d5fd36aec4ceca",
                            "lessThan": "10bc4a4dcded509c5d5c67d497900c3922c604cd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "20b2aff4bc15bda809f994761d5719827d66c0b4",
                            "lessThan": "21a10c06ffae24cb01fd174a7ab7736001d2ea56",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "20b2aff4bc15bda809f994761d5719827d66c0b4",
                            "lessThan": "8755066f7bd0f4ac46a29d1708c7b20894539252",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "20b2aff4bc15bda809f994761d5719827d66c0b4",
                            "lessThan": "70abd9d118da2f56beb4ec22e3a29becae373535",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "20b2aff4bc15bda809f994761d5719827d66c0b4",
                            "lessThan": "63276547debc4d8a73eefb2c5273b2a905c961b0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "20b2aff4bc15bda809f994761d5719827d66c0b4",
                            "lessThan": "4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "20b2aff4bc15bda809f994761d5719827d66c0b4",
                            "lessThan": "b0db1accbc7395657c2b79db59fa9fae0d6656f3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e982070f8970bb62e69ed7c9cafff886ed200349",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.15.37",
                            "lessThan": "5.15.203",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.16.11",
                            "lessThan": "5.17",
                            "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": "5.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.168",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.134",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.81",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.22",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.12",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "5.15.37",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.17",
                                    "versionEndExcluding": "6.1.168"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.17",
                                    "versionEndExcluding": "6.6.134"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.17",
                                    "versionEndExcluding": "6.12.81"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.17",
                                    "versionEndExcluding": "6.18.22"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.17",
                                    "versionEndExcluding": "6.19.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.17",
                                    "versionEndExcluding": "7.0"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16.11"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/10bc4a4dcded509c5d5c67d497900c3922c604cd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/21a10c06ffae24cb01fd174a7ab7736001d2ea56"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8755066f7bd0f4ac46a29d1708c7b20894539252"
                },
                {
                    "url": "https://git.kernel.org/stable/c/70abd9d118da2f56beb4ec22e3a29becae373535"
                },
                {
                    "url": "https://git.kernel.org/stable/c/63276547debc4d8a73eefb2c5273b2a905c961b0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b0db1accbc7395657c2b79db59fa9fae0d6656f3"
                }
            ],
            "title": "bpf: reject direct access to nullable PTR_TO_BUF pointers",
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    }
}