{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23395",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:46.011Z",
        "datePublished": "2026-03-25T10:33:18.936Z",
        "dateUpdated": "2026-08-05T12:21:25.659Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:21:25.659Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ\n\nCurrently the code attempts to accept requests regardless of the\ncommand identifier which may cause multiple requests to be marked\nas pending (FLAG_DEFER_SETUP) which can cause more than\nL2CAP_ECRED_MAX_CID(5) to be allocated in l2cap_ecred_rsp_defer\ncausing an overflow.\n\nThe spec is quite clear that the same identifier shall not be used on\nsubsequent requests:\n\n'Within each signaling channel a different Identifier shall be used\nfor each successive request or indication.'\nhttps://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/Core-62/out/en/host/logical-link-control-and-adaptation-protocol-specification.html#UUID-32a25a06-4aa4-c6c7-77c5-dcfe3682355d\n\nSo this attempts to check if there are any channels pending with the\nsame identifier and rejects if any are found."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "Bluetooth L2CAP stack buffer overflow via duplicate ECRED connection requests with same identifier. l2cap_ecred_rsp_defer() writes past L2CAP_ECRED_MAX_CID(5) array bound on the stack. Triggered over the air by a nearby device, no pairing or authentication needed."
                        }
                    ]
                }
            ],
            "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": [
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                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "10a7a702542240d5edb2b39450ac951c59ccd009",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "46e5b71666fb7652082e4e214a3365f4b14f1dc3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "fb4a3a26483f3ea2cd21c7a2f7c45d5670600465",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "2124d82fd25e1671bb3ceb37998af5aae5903e06",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "6b949a6b33cbdf621d9fc6f0c48ac00915dbf514",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "8d0d94f8ba5b3a0beec3b0da558b9bea48018117",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "e72ee455297b794b852e5cea8d2d7bb17312172a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "15f02b91056253e8cdc592888f431da0731337b8",
                            "lessThan": "5b3e2052334f2ff6d5200e952f4aa66994d09899",
                            "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": "5.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.78",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.20",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.10",
                            "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": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/10a7a702542240d5edb2b39450ac951c59ccd009"
                },
                {
                    "url": "https://git.kernel.org/stable/c/46e5b71666fb7652082e4e214a3365f4b14f1dc3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fb4a3a26483f3ea2cd21c7a2f7c45d5670600465"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2124d82fd25e1671bb3ceb37998af5aae5903e06"
                },
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                    "url": "https://git.kernel.org/stable/c/6b949a6b33cbdf621d9fc6f0c48ac00915dbf514"
                },
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                },
                {
                    "url": "https://git.kernel.org/stable/c/e72ee455297b794b852e5cea8d2d7bb17312172a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5b3e2052334f2ff6d5200e952f4aa66994d09899"
                }
            ],
            "title": "Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ",
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    }
}