Bluetooth: mgmt: fix UAF in pair command cancellation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74510
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:56 UTC
Updated2026-08-17 06:19:47 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: fix UAF in pair command cancellation The pairing completion and authentication failure callbacks look up the pending MGMT_OP_PAIR_DEVICE command by walking hdev->mgmt_pending. The lookup returned a command that was still linked on the shared pending list, without keeping mgmt_pending_lock held for the later dereference and removal. A concurrent MGMT_OP_CANCEL_PAIR_DEVICE request can remove and free the same pending command before the callback uses it. The reverse race is also possible when cancel_pair_device() gets a command from pending_find() and a callback removes it before the cancel path dereferences it. This can lead to a use-after-free and a second list_del(). Make the pairing lookup helpers transfer ownership of the pending command by removing it from hdev->mgmt_pending while holding mgmt_pending_lock. The callbacks and cancel path then complete the command and free it directly, so racing paths cannot find or free the same command again. Take a temporary hci_conn reference in cancel_pair_device() because the command completion drops the reference stored in the pending command.

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: 0.002010000 probability, percentile 0.103740000 (date 2026-08-16)

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 e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 86ed4dd6548ccf277bc691bc912ca06e76b9d80c git Not specified
CNA Linux Linux affected e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 7c2a152a897cd1c184b2051484d4f74d803e7f4a git Not specified
CNA Linux Linux affected e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 c569def320aa8b1fde89227e2ea96606790fd86d git Not specified
CNA Linux Linux affected e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 51be7280980fddc90ebe874a69c2fe8ab02bb46a git Not specified
CNA Linux Linux affected e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd git Not specified
CNA Linux Linux affected 2.6.39 Not specified
CNA Linux Linux unaffected 2.6.39 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/51be7280980fddc90ebe874a69c2fe8ab02bb46a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7c2a152a897cd1c184b2051484d4f74d803e7f4a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c569def320aa8b1fde89227e2ea96606790fd86d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/86ed4dd6548ccf277bc691bc912ca06e76b9d80c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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