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CVE-2026-43021

Bluetooth: hci_sync: fix leaks when hci_cmd_sync_queue_once fails

MEDIUM
5.5
CVSS Score
Published: May 1, 2026 at 02:15 PM UTC
Updated: June 17, 2026 at 10:48 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.19 ≤ v < 6.19.126.19 ≤ v < 7.06.197.0 rc17.0 rc27.0 rc37.0 rc47.0 rc57.0 rc6a106e50be74b0896583f4d010a69f9806e4194f4
Vendor states this is fixed in 7fd74178d4b16dcf47179da634ea9d7c02e3608b (fixed)
Vendor states this is fixed in aca377208e7f7322bf4e107cdec6e7d7e8aa7a88 (fixed)
Vendor states this is fixed in 6.19 (unaffected)
Vendor states this is fixed in 6.19.12 (unaffected)
Vendor states this is fixed in 7.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Patch
Source: cverecord
https://git.kernel.org/stable/c/7fd74178d4b16dcf47179da634ea9d7c02e3608b
Patch
Source: cverecord
https://git.kernel.org/stable/c/aca377208e7f7322bf4e107cdec6e7d7e8aa7a88

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-401

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