{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74529", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.912Z", "datePublished": "2026-08-15T12:27:44.783Z", "dateUpdated": "2026-08-17T05:48:18.894Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:48:18.894Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hold conn in hci_connect_pa_sync() callback\n\nThere is theoretical UAF if the conn is freed while the hci_sync task is\nrunning.\n\nHold refcount to avoid that."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Reached only via local AF_BLUETOOTH BTPROTO_ISO SOCK_SEQPACKET listen() for LE broadcast PA sync (iso_listen_bis\u2192hci_pa_create_sync\u2192hci_connect_pa_sync); no over-the-air packet parsing triggers the bug and a remote Bluetooth peer alone cannot invoke it.\nAC:L - Use-after-free race is attacker-controlled: a local process can listen() to start hci_le_pa_create_sync and immediately close/unlink the socket to drop the PA_LINK hci_conn while cmd_sync_work is still running, retrying until the callback dereferences freed memory.\nPR:L - ISO sockets perform no capability checks in iso_sock_create/bt_sock_create (only init_net), so any unprivileged local user who can open AF_BLUETOOTH sockets on a BT_ISO-capable host can reach hci_connect_pa_sync without CAP_NET_ADMIN or root.\nUI:N - Exploitation requires no victim action; the attacker opens, binds, and listens on their own ISO socket and races teardown\u2014typical on phones/headsets running LE Audio broadcast receivers with Bluetooth access granted to the attacking app/process.\nS:U - Impact stays within kernel memory via hci_conn UAF in create_pa_complete/hci_le_pa_create_sync; this is standard kernel memory corruption/privilege escalation, not a cross-boundary escape (VM, IOMMU, or sandbox).\nC:H - UAF of struct hci_conn lets an attacker influence freed slab contents and read adjacent kernel data through hci_conn_valid(), conn->flags, and conn->iso_qos dereferences during async PA sync work and error callbacks.\nI:H - Freed hci_conn is written via set_bit/clear_bit on conn->flags and error-path hci_connect_cfm()/hci_conn_add_unset in create_pa_complete; heap grooming of the reclaimed allocation enables arbitrary kernel writes and control-flow hijack.\nA:H - Dereferencing or deleting a freed hci_conn in hci_cmd_sync_work reliably causes kernel memory corruption, oops, or panic; UAFs in this subsystem have been observed to crash the host even when not fully exploited for privilege escalation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/hci_sync.c"], "versions": [{"version": "6d0417e4e1cf66fd917f06f0454958362714ef7d", "lessThan": "c53c70ec289ee12f20c4f1b2fbfd151762c01f67", "status": "affected", "versionType": "git"}, {"version": "6d0417e4e1cf66fd917f06f0454958362714ef7d", "lessThan": "44fc74069d8988f2825246f9401218e29de2c0ab", "status": "affected", "versionType": "git"}, {"version": "eb8b860e87b296bd1874c79a668081efd00f9754", "status": "affected", "versionType": "git"}, {"version": "94bf6380e936339a700c0b3171a49baf512aa70b", "status": "affected", "versionType": "git"}, {"version": "6.12.28", "lessThan": "6.13", "status": "affected", "versionType": "semver"}, {"version": "6.14.6", "lessThan": "6.15", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/hci_sync.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "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": "6.15", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.28"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c53c70ec289ee12f20c4f1b2fbfd151762c01f67"}, {"url": "https://git.kernel.org/stable/c/44fc74069d8988f2825246f9401218e29de2c0ab"}], "title": "Bluetooth: hci_sync: hold conn in hci_connect_pa_sync() callback", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c53c70ec289ee12f20c4f1b2fbfd151762c01f67", "status": "affected", "version": "6d0417e4e1cf66fd917f06f0454958362714ef7d", "versionType": "git"}, {"lessThan": "44fc74069d8988f2825246f9401218e29de2c0ab", "status": "affected", "version": "6d0417e4e1cf66fd917f06f0454958362714ef7d", "versionType": "git"}, {"status": "affected", "version": "eb8b860e87b296bd1874c79a668081efd00f9754", "versionType": "git"}, {"status": "affected", "version": "94bf6380e936339a700c0b3171a49baf512aa70b", "versionType": "git"}, {"lessThan": "6.13", "status": "affected", "version": "6.12.28", "versionType": "semver"}, {"lessThan": "6.15", "status": "affected", "version": "6.14.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "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: hci_sync: hold conn in hci_connect_pa_sync() callback\n\nThere is theoretical UAF if the conn is freed while the hci_sync task is\nrunning.\n\nHold refcount to avoid that."}], "id": "CVE-2026-74529", "lastModified": "2026-08-17T06:19:49.770", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T13:17:58.190", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/44fc74069d8988f2825246f9401218e29de2c0ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c53c70ec289ee12f20c4f1b2fbfd151762c01f67"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Bluetooth: hci_sync: hold conn in hci_connect_pa_sync() callback", "id": "2517098", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517098"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's Bluetooth Host Controller Interface (HCI) synchronization component. This vulnerability, a Use-After-Free (UAF), occurs when a connection object is prematurely released while the `hci_sync` task is still active. A local attacker could potentially exploit this to cause a system crash or other undefined behavior, leading to a denial of service or possibly arbitrary code execution."], "name": "CVE-2026-74529", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74529\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74529\nhttps://lore.kernel.org/linux-cve-announce/2026081546-CVE-2026-74529-1f0a@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6d0417e4e1cf66fd917f06f0454958362714ef7d,c53c70ec289ee12f20c4f1b2fbfd151762c01f67)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6d0417e4e1cf66fd917f06f0454958362714ef7d,44fc74069d8988f2825246f9401218e29de2c0ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "eb8b860e87b296bd1874c79a668081efd00f9754"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "94bf6380e936339a700c0b3171a49baf512aa70b"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.28,6.13)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.14.6,6.15)"}}], "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": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.8,7.1.*]"}}, {"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": "2026-08-15T14:45:03.920916+00:00", "updated": "2026-08-18T03:00:09.679996+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-825"]}