{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63974", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.024Z", "datePublished": "2026-07-19T14:55:59.994Z", "dateUpdated": "2026-07-20T13:41:58.081Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T13:41:58.081Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close\n\nSince hci_dev_close_sync() can now be called during the reset path, we\nshould also set HCI_CMD_DRAIN_WORKQUEUE. This avoids queuing timeouts\nwhile the hdev workqueue is being drained."}], "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"}}], "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": "877afadad2dce8aae1f2aad8ce47e072d4f6165e", "lessThan": "9cebe4680bb9a72f80c6541eb24af06db7a1fbc9", "status": "affected", "versionType": "git"}, {"version": "877afadad2dce8aae1f2aad8ce47e072d4f6165e", "lessThan": "47330cc875b36a1cf7b3543cb2cf90a7c603ce0e", "status": "affected", "versionType": "git"}, {"version": "877afadad2dce8aae1f2aad8ce47e072d4f6165e", "lessThan": "60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff", "status": "affected", "versionType": "git"}, {"version": "877afadad2dce8aae1f2aad8ce47e072d4f6165e", "lessThan": "525daaea459fc215f432de1b8debbd9144bf97b0", "status": "affected", "versionType": "git"}, {"version": "4bf367fa1fefabdf14938d0ac9ed60020389112e", "status": "affected", "versionType": "git"}, {"version": "3b382555706558f5c0587862b6dc03e96a252bba", "status": "affected", "versionType": "git"}, {"version": "5.18.18", "lessThan": "5.19", "status": "affected", "versionType": "semver"}, {"version": "5.19.2", "lessThan": "5.20", "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": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.0", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9cebe4680bb9a72f80c6541eb24af06db7a1fbc9"}, {"url": "https://git.kernel.org/stable/c/47330cc875b36a1cf7b3543cb2cf90a7c603ce0e"}, {"url": "https://git.kernel.org/stable/c/60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff"}, {"url": "https://git.kernel.org/stable/c/525daaea459fc215f432de1b8debbd9144bf97b0"}], "title": "Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close", "id": "2502462", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502462"}, "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-366", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close\nSince hci_dev_close_sync() can now be called during the reset path, we\nshould also set HCI_CMD_DRAIN_WORKQUEUE. This avoids queuing timeouts\nwhile the hdev workqueue is being drained.", "A flaw was found in the Bluetooth hci_sync component of the Linux kernel. When the hci_dev_close_sync() function is called during a device reset, the system may experience queuing timeouts. This occurs because the HCI_CMD_DRAIN_WORKQUEUE flag is not properly set, which can lead to system instability or a denial of service (DoS) condition."], "name": "CVE-2026-63974", "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": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63974\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63974\nhttps://lore.kernel.org/linux-cve-announce/2026071900-CVE-2026-63974-2863@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[877afadad2dce8aae1f2aad8ce47e072d4f6165e,9cebe4680bb9a72f80c6541eb24af06db7a1fbc9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[877afadad2dce8aae1f2aad8ce47e072d4f6165e,47330cc875b36a1cf7b3543cb2cf90a7c603ce0e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[877afadad2dce8aae1f2aad8ce47e072d4f6165e,60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[877afadad2dce8aae1f2aad8ce47e072d4f6165e,525daaea459fc215f432de1b8debbd9144bf97b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4bf367fa1fefabdf14938d0ac9ed60020389112e"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3b382555706558f5c0587862b6dc03e96a252bba"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.18.18,5.19)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.19.2,5.20)"}}], "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": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T06:15:01.897294+00:00", "updated": "2026-07-21T23:00:05.168111+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-703"]}