Bug 2466808 (CVE-2026-43069)

Summary:	CVE-2026-43069 kernel: Bluetooth: hci_ll: Fix firmware leak on error path
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's Bluetooth subsystem, specifically in the hci_ll component. A local user could exploit this vulnerability when the system attempts to download firmware. If the firmware content is invalid or empty after a successful request, the system fails to release the allocated resources, leading to a resource leak. This continuous resource depletion could eventually result in a Denial of Service (DoS) condition, making the system unstable or unresponsive.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-05 17:03:40 UTC

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_ll: Fix firmware leak on error path

Smatch reports:

drivers/bluetooth/hci_ll.c:587 download_firmware() warn:
'fw' from request_firmware() not released on lines: 544.

In download_firmware(), if request_firmware() succeeds but the returned
firmware content is invalid (no data or zero size), the function returns
without releasing the firmware, resulting in a resource leak.

Fix this by calling release_firmware() before returning when
request_firmware() succeeded but the firmware content is invalid.

Comment 1 Alexander B 2026-05-06 09:18:39 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050533-CVE-2026-43069-add7@gregkh/T