CVE-2023-54210

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor() KASAN reports that there's a use-after-free in hci_remove_adv_monitor(). Trawling through the disassembly, you can see that the complaint is from the access in bt_dev_dbg() under the HCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because msft_remove_monitor() can end up freeing the monitor structure. Specifically: hci_remove_adv_monitor() -> msft_remove_monitor() -> msft_remove_monitor_sync() -> msft_le_cancel_monitor_advertisement_cb() -> hci_free_adv_monitor() Let's fix the problem by just stashing the relevant data when it's still valid.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0d4d6b083da9b033ddccef72d77f373c819ae3ea
https://git.kernel.org/stable/c/bf00c2c8f6254f44ac041aa9a311ae9e0caf692b
https://git.kernel.org/stable/c/de6dfcefd107667ce2dbedf4d9337f5ed557a4a1

Configurations

No configuration.

History

04 Aug 2026, 11:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8

30 Dec 2025, 13:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-30 13:16

Updated : 2026-08-04 11:16

NVD link : CVE-2023-54210

Mitre link : CVE-2023-54210

CVE.ORG link : CVE-2023-54210

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2023-54210", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"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"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c", "lessThan": "0d4d6b083da9b033ddccef72d77f373c819ae3ea", "versionType": "git"}, {"status": "affected", "version": "7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c", "lessThan": "bf00c2c8f6254f44ac041aa9a311ae9e0caf692b", "versionType": "git"}, {"status": "affected", "version": "7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c", "lessThan": "de6dfcefd107667ce2dbedf4d9337f5ed557a4a1", "versionType": "git"}], "programFiles": ["net/bluetooth/hci_core.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.42", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.4.7", "versionType": "semver", "lessThanOrEqual": "6.4.*"}, {"status": "unaffected", "version": "6.5", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/bluetooth/hci_core.c"], "defaultStatus": "affected"}]}], "published": "2025-12-30T13:16:09.197", "references": [{"url": "https://git.kernel.org/stable/c/0d4d6b083da9b033ddccef72d77f373c819ae3ea", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bf00c2c8f6254f44ac041aa9a311ae9e0caf692b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/de6dfcefd107667ce2dbedf4d9337f5ed557a4a1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Deferred", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()\n\nKASAN reports that there's a use-after-free in\nhci_remove_adv_monitor(). Trawling through the disassembly, you can\nsee that the complaint is from the access in bt_dev_dbg() under the\nHCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because\nmsft_remove_monitor() can end up freeing the monitor\nstructure. Specifically:\n hci_remove_adv_monitor() ->\n msft_remove_monitor() ->\n msft_remove_monitor_sync() ->\n msft_le_cancel_monitor_advertisement_cb() ->\n hci_free_adv_monitor()\n\nLet's fix the problem by just stashing the relevant data when it's\nstill valid."}], "lastModified": "2026-08-04T11:16:36.870", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}