CVE-2022-49136

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an adjacent peer can feed HCI/LE events into the queue path but cannot itself unregister the controller, matching prior hci_cmd_sync/unregister UAF scores.\nAC:L - Via /dev/vhci the attacker controls both sides\u2014injecting HCI traffic or issuing mgmt/connect paths that call hci_cmd_sync_queue while closing the fd to run hci_unregister_dev/hci_cmd_sync_clear\u2014and can retry open/queue/close until the post-unregister queue wins and the freed hdev is reused.\nPR:L - vhci_open() has no capable() check, so any principal with the device node (Android bluetooth uid, containers, permissive udev) can create/destroy virtual controllers and inject frames without real init-namespace root, consistent with CVE-2023-53046/CVE-2024-58241/CVE-2025-38250.\nUI:N - The attacker performs device creation, command/event injection, and teardown entirely from its own processes; no separate victim action such as mounting a filesystem or confirming a prompt is required.\nS:U - The use-after-free corrupts kernel slab/workqueue state within the host kernel\u2019s security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Queuing after HCI_UNREGISTER leaves cmd_sync work running against a freed hci_dev after timeout/teardown; reclaiming that object yields a use-after-free read primitive over kernel heap contents, so confidentiality is High.\nI:H - The same UAF exposes sprayable hci_dev/work-entry state (including function pointers invoked from hci_cmd_sync_work), enabling arbitrary write and control-flow hijack after heap grooming.\nA:H - Use-after-free of hdev in cmd_sync/timeout paths causes kernel oops/panic even when not fully exploited, which is High availability impact."}]}], "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": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "lessThan": "1c69ef84a808676cceb69210addf5df45b741323", "status": "affected", "versionType": "git"}, {"version": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "lessThan": "0b94f2651f56b9e4aa5f012b0d7eb57308c773cf", "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": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.3", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18", "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": "5.17", "versionEndExcluding": "5.17.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "5.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1c69ef84a808676cceb69210addf5df45b741323"}, {"url": "https://git.kernel.org/stable/c/0b94f2651f56b9e4aa5f012b0d7eb57308c773cf"}], "title": "Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49136", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-27T17:59:07.674181Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:02:29.693Z"}}]}}

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an adjacent peer can feed HCI/LE events into the queue path but cannot itself unregister the controller, matching prior hci_cmd_sync/unregister UAF scores.\nAC:L - Via /dev/vhci the attacker controls both sides\u2014injecting HCI traffic or issuing mgmt/connect paths that call hci_cmd_sync_queue while closing the fd to run hci_unregister_dev/hci_cmd_sync_clear\u2014and can retry open/queue/close until the post-unregister queue wins and the freed hdev is reused.\nPR:L - vhci_open() has no capable() check, so any principal with the device node (Android bluetooth uid, containers, permissive udev) can create/destroy virtual controllers and inject frames without real init-namespace root, consistent with CVE-2023-53046/CVE-2024-58241/CVE-2025-38250.\nUI:N - The attacker performs device creation, command/event injection, and teardown entirely from its own processes; no separate victim action such as mounting a filesystem or confirming a prompt is required.\nS:U - The use-after-free corrupts kernel slab/workqueue state within the host kernel\u2019s security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Queuing after HCI_UNREGISTER leaves cmd_sync work running against a freed hci_dev after timeout/teardown; reclaiming that object yields a use-after-free read primitive over kernel heap contents, so confidentiality is High.\nI:H - The same UAF exposes sprayable hci_dev/work-entry state (including function pointers invoked from hci_cmd_sync_work), enabling arbitrary write and control-flow hijack after heap grooming.\nA:H - Use-after-free of hdev in cmd_sync/timeout paths causes kernel oops/panic even when not fully exploited, which is High availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "lessThan": "1c69ef84a808676cceb69210addf5df45b741323", "versionType": "git"}, {"status": "affected", "version": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "lessThan": "0b94f2651f56b9e4aa5f012b0d7eb57308c773cf", "versionType": "git"}], "programFiles": ["net/bluetooth/hci_sync.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.17"}, {"status": "unaffected", "version": "0", "lessThan": "5.17", "versionType": "semver"}, {"status": "unaffected", "version": "5.17.3", "versionType": "semver", "lessThanOrEqual": "5.17.*"}, {"status": "unaffected", "version": "5.18", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/bluetooth/hci_sync.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/1c69ef84a808676cceb69210addf5df45b741323"}, {"url": "https://git.kernel.org/stable/c/0b94f2651f56b9e4aa5f012b0d7eb57308c773cf"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set\n\nhci_cmd_sync_queue shall return an error if HCI_UNREGISTER flag has\nbeen set as that means hci_unregister_dev has been called so it will\nlikely cause a uaf after the timeout as the hdev will be freed."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.17.3", "versionStartIncluding": "5.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.18", "versionStartIncluding": "5.17"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:01.573Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49136", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:54:01.573Z", "dateReserved": "2025-02-26T01:49:39.268Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-02-26T01:55:09.345Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"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": "1c69ef84a808676cceb69210addf5df45b741323", "status": "affected", "version": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "versionType": "git"}, {"lessThan": "0b94f2651f56b9e4aa5f012b0d7eb57308c773cf", "status": "affected", "version": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "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": "5.17"}, {"lessThan": "5.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AE420AC7-1E59-4398-B84F-71F4B4337762", "versionEndExcluding": "5.17.3", "versionStartIncluding": "5.17", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set\n\nhci_cmd_sync_queue shall return an error if HCI_UNREGISTER flag has\nbeen set as that means hci_unregister_dev has been called so it will\nlikely cause a uaf after the timeout as the hdev will be freed."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: hci_sync: Se corrige la puesta en cola de comandos cuando HCI_UNREGISTER est\u00e1 configurado hci_cmd_sync_queue devolver\u00e1 un error si se ha configurado el indicador HCI_UNREGISTER, ya que eso significa que se ha llamado a hci_unregister_dev, por lo que probablemente causar\u00e1 un uaf despu\u00e9s del tiempo de espera, ya que se liberar\u00e1 el hdev."}], "id": "CVE-2022-49136", "lastModified": "2026-06-17T05:17:11.257", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49136", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-02-27T17:59:07.674181Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:00:50.867", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0b94f2651f56b9e4aa5f012b0d7eb57308c773cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1c69ef84a808676cceb69210addf5df45b741323"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2025:10670", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.60.1.rt7.401.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-07-09T00:00:00Z"}, {"advisory": "RHSA-2025:10669", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.60.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-07-09T00:00:00Z"}, {"advisory": "RHSA-2023:2458", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}, {"advisory": "RHSA-2023:2458", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}], "bugzilla": {"description": "kernel: Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set", "id": "2348179", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348179"}, "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": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set\nhci_cmd_sync_queue shall return an error if HCI_UNREGISTER flag has\nbeen set as that means hci_unregister_dev has been called so it will\nlikely cause a uaf after the timeout as the hdev will be freed.", "A vulnerability was found in the Linux kernel's Bluetooth subsystem in the `hci_cmd_sync_queue()` function. There was a missing check for whether the `HCI_UNREGISTER` flag had been set, meaning that commands were still sent even as the Bluetooth device was being unregistered. This issue could lead to a use-after-free scenario where the command is executed after the device structure is freed, potentially leading to a crash, arbitrary code execution, and system instability."], "name": "CVE-2022-49136", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49136\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49136\nhttps://lore.kernel.org/linux-cve-announce/2025022606-CVE-2022-49136-033c@gregkh/T"], "threat_severity": "Moderate"}

{}