{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53374", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:54:09.734Z", "datePublished": "2025-09-18T13:33:20.965Z", "dateUpdated": "2026-08-05T09:13:43.036Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:13:43.036Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early\n\nNot calling hci_(dis)connect_cfm before deleting conn referred to by a\nsocket generally results to use-after-free.\n\nWhen cleaning up SCO connections when the parent ACL is deleted too\nearly, use hci_conn_failed to do the connection cleanup properly.\n\nWe also need to clean up ISO connections in a similar situation when\nconnecting has started but LE Create CIS is not yet sent, so do it too\nhere." } ], "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 bug is in Bluetooth HCI connection teardown for SCO/ISO children; an in-range peer can drop the parent ACL (HCI disconnect / link loss) while SCO or ISO setup still has an unset handle, which is the Adjacent Bluetooth deployment model for phones and headsets.\nAC:L - The attacker controls both sides of the timing window by initiating or observing SCO/ISO setup and then aborting the parent ACL before the child handle is assigned; syzbot reproduced this reliably, and UAF bugs are AC:L unless a truly uncontrollable race is required.\nPR:N - An adjacent Bluetooth peer triggers the vulnerable hci_conn_unlink child cleanup via over-the-air ACL teardown with no local account or capability on the victim; the dangling socket reference is held by ordinary Bluetooth audio stacks already running on the device.\nUI:N - Once Bluetooth is up with a SCO/ISO path in progress (headset/HFP/LE Audio), the peer’s own disconnect drives the free without requiring the victim to open a file, mount anything, or otherwise interact at exploit time.\nS:U - The use-after-free corrupts kernel heap within the same host kernel authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - This is a slab use-after-free of the hci_conn object still referenced by the SCO socket; UAF enables attacker control of freed object contents and arbitrary kernel read primitives.\nI:H - KASAN confirmed a slab-use-after-free write in sco_chan_del via hci_conn_drop/atomic_dec_and_test on the freed hci_conn, which is exploitable for heap corruption and control-flow hijacking.\nA:H - The UAF causes kernel oops/panic under normal close/teardown even when not fully exploited, matching High availability impact for use-after-free bugs." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_conn.c" ], "versions": [ { "version": "ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f", "lessThan": "397d58007532644b35fad746da48c41161f32a57", "status": "affected", "versionType": "git" }, { "version": "ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f", "lessThan": "e94b898463a62b72a2a8b75dea8936bf4db78e00", "status": "affected", "versionType": "git" }, { "version": "ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f", "lessThan": "3344d318337d9dca928fd448e966557ec5063f85", "status": "affected", "versionType": "git" }, { "version": "75e35bd4b7935ceed2aacd82f55940e73bf0b63b", "status": "affected", "versionType": "git" }, { "version": "6.3.8", "lessThan": "6.4", "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_conn.c" ], "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.16", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5.3", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6", "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": "6.4", "versionEndExcluding": "6.4.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.5.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/397d58007532644b35fad746da48c41161f32a57" }, { "url": "https://git.kernel.org/stable/c/e94b898463a62b72a2a8b75dea8936bf4db78e00" }, { "url": "https://git.kernel.org/stable/c/3344d318337d9dca928fd448e966557ec5063f85" } ], "title": "Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early", "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-2023-53374", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:54:25.271043Z" } } } ], "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": "2026-01-14T19:03:03.307Z" } } ] } }