Bug 2560852 (CVE-2026-99094)

Summary:	CVE-2026-99094 kernel: Bluetooth: btintel_pcie: fix TX descriptor bounds check
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:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	A flaw was found in the Linux kernel's Intel Bluetooth PCIe driver. An off-by-one bounds check fails to properly validate the transmission descriptor index against the queue limit during packet preparation. A local attacker could exploit this issue to trigger an out-of-bounds memory access, leading to memory corruption and a Denial of Service (DoS) via a system crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-10-26 15:17:13 UTC

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

Bluetooth: btintel_pcie: fix TX descriptor bounds check

btintel_pcie_prepare_tx() uses tfd_index to access the TFD and data
buffer arrays before the index is advanced modulo txq->count. An index
equal to txq->count is one past the end of both arrays, so reject it in
the bounds check.

Comment 1 gkamathe 2026-10-27 06:12:16 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99094.mbox