CVE-2026-43021

Medium

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix leaks when hci_cmd_sync_queue_once fails When hci_cmd_sync_queue_once() returns with error, the destroy callback will not be called. Fix leaking references / memory on these failures.

SeverityMedium

CVSS5.5

Exploit probability—

Product

Linux Kernel

PublishedMay 1, 2026

First seenMay 1, 2026

Weakness typeCWE-401CWE-401

How to fix

Update

linux linux_kernel6.19.12 or later

Patches

git.kernel.org/stable/c/7fd74178d4b16dcf47179da634ea9d7c02e3608b
git.kernel.org/stable/c/aca377208e7f7322bf4e107cdec6e7d7e8aa7a88

Affected products

Product	Affected versions	Fixed in
linux linux_kernel	6.19 ≤ v < 6.19.12, 7.0	6.19.12

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.