CVE-2026-43021 Details
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.
A memory leak vulnerability has been addressed in the Linux kernel's Bluetooth subsystem. The issue arises in the command synchronization process, specifically within the 'hci_cmd_sync_queue_once' function. When this function encounters an error, it fails to invoke the necessary cleanup callback, leading to unfreed references and memory. This vulnerability affects the stable version of the Linux kernel.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/7fd74178d4b16dcf47179da634ea9d7c02e3608b | kernel.org | Patch |
| https://git.kernel.org/stable/c/aca377208e7f7322bf4e107cdec6e7d7e8aa7a88 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-401 | Missing Release of Memory after Effective Lifetime | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.19, < 6.19.12 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | Initial Analysis | [email protected] |
| May 1, 2026 | New CVE Received | kernel.org |