Bug 2517067 (CVE-2026-74532)

Summary:	CVE-2026-74532 kernel: Bluetooth: btintel: Validate length before parsing diagnostics TLV
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
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 Bluetooth `btintel` driver of the Linux kernel. The `btintel_diagnostics()` function fails to validate the length of a diagnostics Vendor Specific Event (VSE) before accessing its data. This oversight allows an attacker to potentially read data beyond the intended memory boundary, which could lead to information disclosure.	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 2026-08-15 12:47:52 UTC

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

Bluetooth: btintel: Validate length before parsing diagnostics TLV

btintel_diagnostics() accesses tlv->val[0] without first validating
that the diagnostics VSE is long enough to contain that field, so
may cause reading data beyond the received frame.

Fix by validating the length before access.

Comment 1 Mauro Matteo Cascella 2026-08-19 16:01:07 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081547-CVE-2026-74532-4966@gregkh/T