CVE-2026-68390

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68390", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.388Z", "datePublished": "2026-08-10T12:04:09.373Z", "dateUpdated": "2026-08-17T05:04:37.940Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:04:37.940Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups\n\nhci_conn_params_lookup requires hdev->lock be held, otherwise the list\niteration or param access is not safe.\n\nHold hdev->lock for params lookups in hci_sync."}], "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 vulnerable hci_sync paths are Bluetooth LE host-stack code: hci_le_create_conn_sync is queued autonomously from check_pending_le_conn() on incoming LE advertising reports, and the racing hci_conn_params_del() side is driven by LE connection-complete/failure and disconnect events, so a device in radio range drives the bug over the air.\nAC:L - The attacker controls both sides of the race \u2014 repeated LE connect/disconnect and PA-sync setup/teardown cycles queue the cmd_sync work while the event workqueue concurrently runs hci_conn_params_del()/hci_conn_del() under hdev->lock \u2014 and the sleeping hci_pause_advertising_sync() right before the unlocked lookup widens the window, so it can be retried until won.\nPR:N - No credentials, pairing, or local account are needed: the host stack queues hci_le_create_conn_sync automatically in response to advertising reports from a device on the accept list, and the freeing side is triggered by connection-complete/failure events the peer controls.\nUI:N - Background LE scanning, auto-connect, accept-list programming, and connection-failure cleanup are performed autonomously by the kernel whenever connection state changes; no victim action such as pairing confirmation or opening a device is required.\nS:U - The corruption is confined to kernel heap objects owned by the Bluetooth subsystem within the same security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - hci_conn_params_lookup() iterates and dereferences a list entry that another CPU may have list_del()'d and kfree()'d, and hci_le_pa_create_sync() reads le->dst/le->handle from a possibly freed hci_conn; a groomed slab yields an arbitrary read primitive, and the stale values are copied into the outgoing HCI command, leaking kernel heap contents over the air.\nI:H - This is a classic slab use-after-free on hci_conn_params/hci_conn: reclaiming the freed object with attacker-controlled data gives write and control-flow primitives, and the corrupted values are written into conn->le_conn_* fields and the HCI command payload, so kernel memory corruption and privilege escalation are leverageable.\nA:H - Walking le_conn_params without hdev->lock while an entry is removed dereferences LIST_POISON1 or freed memory, producing slab-use-after-free KASAN splats, oopses, or a kernel panic in the Bluetooth workqueues."}]}], "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": "c530569adc19b5f0c62955de41f067bad34e3fe0", "lessThan": "8d892bec1dd134761cabec6ba23fe315d0f20f98", "status": "affected", "versionType": "git"}, {"version": "c530569adc19b5f0c62955de41f067bad34e3fe0", "lessThan": "c363202ec841df36421ec280eea3d5f94f556143", "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/hci_sync.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "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": "6.19", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8d892bec1dd134761cabec6ba23fe315d0f20f98"}, {"url": "https://git.kernel.org/stable/c/c363202ec841df36421ec280eea3d5f94f556143"}], "title": "Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups", "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": "8d892bec1dd134761cabec6ba23fe315d0f20f98", "status": "affected", "version": "c530569adc19b5f0c62955de41f067bad34e3fe0", "versionType": "git"}, {"lessThan": "c363202ec841df36421ec280eea3d5f94f556143", "status": "affected", "version": "c530569adc19b5f0c62955de41f067bad34e3fe0", "versionType": "git"}]}, {"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": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.6", "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 hdev->lock for hci_conn_params lookups\n\nhci_conn_params_lookup requires hdev->lock be held, otherwise the list\niteration or param access is not safe.\n\nHold hdev->lock for params lookups in hci_sync."}], "id": "CVE-2026-68390", "lastModified": "2026-08-17T06:17:47.643", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-10T13:20:32.323", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d892bec1dd134761cabec6ba23fe315d0f20f98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c363202ec841df36421ec280eea3d5f94f556143"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups", "id": "2513158", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513158"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-414", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups\nhci_conn_params_lookup requires hdev->lock be held, otherwise the list\niteration or param access is not safe.\nHold hdev->lock for params lookups in hci_sync.", "A flaw was found in the Linux kernel's Bluetooth subsystem, specifically within the `hci_sync` component. This vulnerability occurs because the `hci_conn_params_lookup` function does not properly hold a necessary lock (`hdev->lock`) during operations. This oversight can lead to unsafe list iterations or parameter access, potentially resulting in data corruption or system instability."], "name": "CVE-2026-68390", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68390\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68390\nhttps://lore.kernel.org/linux-cve-announce/2026081046-CVE-2026-68390-f0ca@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c530569adc19b5f0c62955de41f067bad34e3fe0,8d892bec1dd134761cabec6ba23fe315d0f20f98)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c530569adc19b5f0c62955de41f067bad34e3fe0,c363202ec841df36421ec280eea3d5f94f556143)"}}], "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": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc4,*]"}}], "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": "2026-08-10T17:00:03.761977+00:00", "updated": "2026-08-14T02:00:15.440864+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}