Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-54210
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-30 13:16:09 UTC
Updated2026-10-15 22:17:55 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001280000 probability, percentile 0.028780000 (date 2026-08-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c 0d4d6b083da9b033ddccef72d77f373c819ae3ea git Not specified
CNA Linux Linux affected 7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c bf00c2c8f6254f44ac041aa9a311ae9e0caf692b git Not specified
CNA Linux Linux affected 7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c de6dfcefd107667ce2dbedf4d9337f5ed557a4a1 git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.1.42 6.1.* semver Not specified
CNA Linux Linux unaffected 6.4.7 6.4.* semver Not specified
CNA Linux Linux unaffected 6.5 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bf00c2c8f6254f44ac041aa9a311ae9e0caf692b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/de6dfcefd107667ce2dbedf4d9337f5ed557a4a1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0d4d6b083da9b033ddccef72d77f373c819ae3ea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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