Medium 5.5Published May 1, 2026

CVE-2026-43021Bluetooth: hci_sync: fix leaks when hci_cmd_sync_queue_once fails

Updated under an hour ago (Oct 28, 2026, 2:40 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from a106e50be74b0896583f4d010a69f9806e4194f4 before 7fd74178d4b16dcf47179da634ea9d7c02e3608b; from a106e50be74b0896583f4d010a69f9806e4194f4 before aca377208e7f7322bf4e107cdec6e7d7e8aa7a88	CNA record
linux linux_kernel linux:linux_kernel	from 6.19 before 6.19.12; 7.0; 7.0; 7.0; 7.0; 7.0; 7.0	NVD

References

References

https://git.kernel.org/stable/c/7fd74178d4b16dcf47179da634ea9d7c02e3608b	patch
https://git.kernel.org/stable/c/aca377208e7f7322bf4e107cdec6e7d7e8aa7a88	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.