{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72334",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.920Z",
        "datePublished": "2026-08-15T05:55:43.160Z",
        "dateUpdated": "2026-08-17T05:42:54.538Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:42:54.538Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix malformed ISO_END/CONT handling\n\nCore specification (Part C vol 4 sec 5.4.5) does not exclude empty\nISO_CONT, ISO_END packets.  We currently reject them if they are last.\n\nIf controller sends malformed sequence\n\n    ISO_START -> rx_len = 4, ISO_CONT skb->len 4, ISO_START\n\nthat ends payload in ISO_CONT, we leak conn->rx_skb. If controller sends\ntoo long ISO_END, we panic on skb_put. If controller sends too short\nISO_END we accept it.\n\nFix by marking unfinished ISO_START via conn->rx_skb != NULL.  Check\nskb->len properly before skb_put.  Combine the ISO_CONT/END code paths\nas they require the same initial checks. Reject too short ISO_END\npackets."
                }
            ],
            "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": "AV:A - The bug is in iso_recv(), which handles HCI ISO data from the Bluetooth controller during active CIS/BIS ISO transports; a nearby radio peer can deliver malformed ISO fragment sequences without any IP/network path.\nAC:L - An adjacent attacker can reliably craft the malformed ISO_START/ISO_CONT/ISO_END sequences described in the fix (or inject equivalent HCI ISO packets) to trigger skb_put overflow, skb leaks, or acceptance of undersized END fragments.\nPR:N - No Linux credentials are required; an unauthenticated adjacent Bluetooth broadcaster on BIS or CIS peer can drive the vulnerable reassembly path once the victim host has an active ISO connection.\nUI:N - Exploitation does not require a distinct victim action at trigger time; hosts with Bluetooth enabled routinely maintain CIS sessions or background BIS/LE Audio sync that already deliver ISO traffic to iso_recv().\nS:U - Impact is confined to kernel heap corruption and denial of service within the Bluetooth ISO receive path and does not cross VM, container, or IOMMU security boundaries.\nC:H - An oversized ISO_END causes skb_put() to write past the allocated rx_skb buffer (heap overflow), enabling disclosure of adjacent kernel memory per memory-corruption scoring guidance.\nI:H - The skb_put heap overflow writes attacker-controlled ISO payload bytes beyond the skb tail, corrupting adjacent kernel objects and enabling potential arbitrary write or code execution primitives.\nA:H - Oversized ISO_END triggers skb_over_panic (BUG/kernel oops), and repeated malformed sequences leak conn->rx_skb causing memory exhaustion, both producing complete host denial of service."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bluetooth/iso.c"
                    ],
                    "versions": [
                        {
                            "version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
                            "lessThan": "990e65eb9387c4ddfa7f68782b6644c2c35d489f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a",
                            "lessThan": "e054c1a6ae7310d2815778fddb87da616e11c255",
                            "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/iso.c"
                    ],
                    "versions": [
                        {
                            "version": "6.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.0",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/990e65eb9387c4ddfa7f68782b6644c2c35d489f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e054c1a6ae7310d2815778fddb87da616e11c255"
                }
            ],
            "title": "Bluetooth: ISO: fix malformed ISO_END/CONT handling",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}