{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74539",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.913Z",
        "datePublished": "2026-08-15T12:27:50.902Z",
        "dateUpdated": "2026-08-17T05:48:27.740Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:48:27.740Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: lock sk in iso_sock_getname\n\nAccessing iso_pi(sk)->conn requires lock_sock, which is not held here.\n\nFix by adding the lock/release."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:A - The unlocked `iso_sock_getname()` path is entered only via the local `getpeername()` syscall, but the freeing side races through `iso_conn_del()`/`iso_chan_del()` driven by HCI connect/disconnect events that an adjacent Bluetooth peer can time (CIS/BIS/PA teardown on LE Audio phones, headsets, or kiosks).\nAC:L - An attacker controls both race sides: one thread loops `getpeername()` on a `BTPROTO_ISO` socket while another concurrently calls `close()`/`connect()` or an adjacent peer provokes HCI disconnect; unlimited retries make winning the TOCTOU on `iso_pi(sk)->conn` reliably achievable.\nPR:L - `iso_sock_create()`/`bt_sock_create()` impose no `CAP_NET_ADMIN` or other capability check; any unprivileged local user in the initial network namespace who can open `AF_BLUETOOTH`/`BTPROTO_ISO` sockets can reach the vulnerable `getpeername()` handler (Bluetooth is unavailable in user namespaces).\nUI:N - Exploitation requires only attacker-controlled ISO socket syscalls and concurrent connection teardown; no victim pairing prompt, mount, or other deliberate user action beyond normal Bluetooth LE Audio use on an already-configured device.\nS:U - Impact is kernel heap UAF/crash or privilege escalation within the host kernel security boundary; it does not cross VM, hypervisor, IOMMU, or application-sandbox boundaries.\nC:H - The double-read `iso_pi(sk)->conn ? iso_pi(sk)->conn->hcon` without `lock_sock` is a classic TOCTOU UAF; dereferencing a freed `iso_conn` and stale `hcon` exposes attacker-influenced kernel heap contents and is leverageable for arbitrary memory disclosure.\nI:H - UAF on the `iso_conn` kmalloc object (~136-byte slab) enables heap grooming/spray; corrupted `hcon` pointers and subsequent kernel reads through attacker-controlled freed memory provide write primitives chainable to control-flow hijack per kernel UAF scoring guidance.\nA:H - Racing `iso_chan_del()` during the unlocked `conn->hcon` dereference or `hcon->type` access can cause immediate kernel oops/panic from NULL/invalid pointer access; UAF in connection teardown independently threatens host availability even before full exploitation."
                        }
                    ]
                }
            ],
            "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": "2df108c227b266a9ec9e3fda3828d2ac9662aa33",
                            "lessThan": "72d5bb1d77d7c3330146dc0cfd43f704c64b9594",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2df108c227b266a9ec9e3fda3828d2ac9662aa33",
                            "lessThan": "202670e6602e068558c1fca2df40719ee91a2906",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2df108c227b266a9ec9e3fda3828d2ac9662aa33",
                            "lessThan": "89cf154d7c18e6e94a3da83051f3cf2bac317ae2",
                            "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": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.44",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.8",
                            "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": "6.16",
                                    "versionEndExcluding": "6.18.44"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.1.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/72d5bb1d77d7c3330146dc0cfd43f704c64b9594"
                },
                {
                    "url": "https://git.kernel.org/stable/c/202670e6602e068558c1fca2df40719ee91a2906"
                },
                {
                    "url": "https://git.kernel.org/stable/c/89cf154d7c18e6e94a3da83051f3cf2bac317ae2"
                }
            ],
            "title": "Bluetooth: ISO: lock sk in iso_sock_getname",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}