{"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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/iso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "72d5bb1d77d7c3330146dc0cfd43f704c64b9594", "status": "affected", "version": "2df108c227b266a9ec9e3fda3828d2ac9662aa33", "versionType": "git"}, {"lessThan": "202670e6602e068558c1fca2df40719ee91a2906", "status": "affected", "version": "2df108c227b266a9ec9e3fda3828d2ac9662aa33", "versionType": "git"}, {"lessThan": "89cf154d7c18e6e94a3da83051f3cf2bac317ae2", "status": "affected", "version": "2df108c227b266a9ec9e3fda3828d2ac9662aa33", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/iso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-74539", "lastModified": "2026-08-17T06:19:51.040", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T13:17:59.233", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/202670e6602e068558c1fca2df40719ee91a2906"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/72d5bb1d77d7c3330146dc0cfd43f704c64b9594"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89cf154d7c18e6e94a3da83051f3cf2bac317ae2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2df108c227b266a9ec9e3fda3828d2ac9662aa33,72d5bb1d77d7c3330146dc0cfd43f704c64b9594)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2df108c227b266a9ec9e3fda3828d2ac9662aa33,202670e6602e068558c1fca2df40719ee91a2906)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2df108c227b266a9ec9e3fda3828d2ac9662aa33,89cf154d7c18e6e94a3da83051f3cf2bac317ae2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T14:30:10.512031+00:00", "updated": "2026-08-17T12:15:17.936532+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}