{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98457",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.350Z",
        "datePublished": "2026-10-18T15:15:06.718Z",
        "dateUpdated": "2026-10-19T09:19:53.885Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:19:53.885Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: validate frame length before control and FCS access\n\nl2cap_data_rcv() unpacks either a two-byte or four-byte control field\nwithout first ensuring that it is present. A short ERTM or streaming-mode\nframe can therefore cause an out-of-bounds read.\n\nThere is a second short-frame case when CRC16 is enabled. After the\ncontrol field is pulled, l2cap_check_fcs() subtracts two from skb->len\nwithout checking it. If fewer than two bytes remain, the subtraction\nwraps; skb_trim() leaves the buffer unchanged and the subsequent FCS\nload reads past the logical end of the frame.\n\nValidate that the frame contains both its control field and, when\nenabled, its FCS before either field is accessed."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bluetooth/l2cap_core.c"
                    ],
                    "versions": [
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "4373ba79a267947e771c438507f7b103e30bdb21",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "965bd88ed4b4763cb765dd65885adcfa588c6b14",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "3acf6a0038ec0d4e8f4dcbfc2a557dff5f61cb70",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "8c7556c7cd17e073bbefdc4a9a4694a207544c37",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "1fdbb2a712a9a162ee817c959740face80b3d929",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "c6a288e6001bcce16553c3853e0f5a45eaaf85c7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "f557274af7b94b6134692e6f26b880f1e34c15bf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a",
                            "lessThan": "6c78a213d9070b610c7f418af2c25b66180b7e37",
                            "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/bluetooth/l2cap_core.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.32",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.32",
                            "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": "2.6.32",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.32",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.32",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.32",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.32",
                                    "versionEndExcluding": "6.12.112"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.32",
                                    "versionEndExcluding": "6.18.55"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.32",
                                    "versionEndExcluding": "7.2.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.32",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4373ba79a267947e771c438507f7b103e30bdb21"
                },
                {
                    "url": "https://git.kernel.org/stable/c/965bd88ed4b4763cb765dd65885adcfa588c6b14"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3acf6a0038ec0d4e8f4dcbfc2a557dff5f61cb70"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8c7556c7cd17e073bbefdc4a9a4694a207544c37"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1fdbb2a712a9a162ee817c959740face80b3d929"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c6a288e6001bcce16553c3853e0f5a45eaaf85c7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f557274af7b94b6134692e6f26b880f1e34c15bf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6c78a213d9070b610c7f418af2c25b66180b7e37"
                }
            ],
            "title": "Bluetooth: L2CAP: validate frame length before control and FCS access",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}