{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43092",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.984Z",
        "datePublished": "2026-05-06T07:40:24.619Z",
        "dateUpdated": "2026-05-11T22:17:34.476Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:17:34.476Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate MTU against usable frame size on bind\n\nAF_XDP bind currently accepts zero-copy pool configurations without\nverifying that the device MTU fits into the usable frame space provided\nby the UMEM chunk.\n\nThis becomes a problem since we started to respect tailroom which is\nsubtracted from chunk_size (among with headroom). 2k chunk size might\nnot provide enough space for standard 1500 MTU, so let us catch such\nsettings at bind time. Furthermore, validate whether underlying HW will\nbe able to satisfy configured MTU wrt XSK's frame size multiplied by\nsupported Rx buffer chain length (that is exposed via\nnet_device::xdp_zc_max_segs)."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/xdp/xsk_buff_pool.c"
                    ],
                    "versions": [
                        {
                            "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
                            "lessThan": "a55793e5a97d4e39bdb380873a9780fe0010bff6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
                            "lessThan": "f669d60db11dbabb96279f2b20f9d1cba43cddb2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
                            "lessThan": "25e1e91a8da819924df0b16e3812d7b24c8ce133",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
                            "lessThan": "b2f4daa6422fd6cc0cec969794dab4a88ea4cea1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9",
                            "lessThan": "36ee60b569ba0dfb6f961333b90d19ab5b323fa9",
                            "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/xsk_buff_pool.c"
                    ],
                    "versions": [
                        {
                            "version": "6.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.136",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.83",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.24",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.14",
                            "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": "6.6",
                                    "versionEndExcluding": "6.6.136"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.12.83"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.18.24"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.19.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9"
                }
            ],
            "title": "xsk: validate MTU against usable frame size on bind",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}