CVE-2026-74510: Linux Vulnerability (CVSS 7.8)

Description

In 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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.14%

3.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

Vendor	Product	Versions
Linux	Linux	>= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2, < 50af4280a587c9971b5388cbc438f1324e626b7b; >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2, < 86ed4dd6548ccf277bc691bc912ca06e76b9d80c; >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2, < 7c2a152a897cd1c184b2051484d4f74d803e7f4a; >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2, < c569def320aa8b1fde89227e2ea96606790fd86d; >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2, < 51be7280980fddc90ebe874a69c2fe8ab02bb46a; >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2, < d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd
Linux	Linux	2.6.39

References

Timeline

Published: Aug 15, 2026
Last Modified: Aug 23, 2026
Status: Received

Frequently Asked Questions

What is CVE-2026-74510?

In 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.

How severe is CVE-2026-74510?

CVE-2026-74510 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2026-74510?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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