Bug 2555119 (CVE-2026-98730)

Summary:	CVE-2026-98730 kernel: Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()
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:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's Intel Bluetooth PCIe driver. A local user with access to the Bluetooth Host Controller Interface (HCI) user channel can inject an oversized transmission packet. Because the driver fails to validate packet length before copying data into a fixed-size memory buffer, this issue causes a buffer overflow. This flaw can lead to arbitrary code execution or a system crash resulting in a Denial of Service (DoS).	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-10-18 15:55:32 UTC

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

Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()

btintel_pcie_send_frame() eventually copies skb->data into a fixed
BTINTEL_PCIE_BUFFER_SIZE (4096) DMA buffer via memcpy() in
btintel_pcie_prepare_tx(), with a 4-byte PCIe type header prepended.
A user-space process with HCI_CHANNEL_USER access can inject an
oversized packet and overflow the buffer.

Reject packets larger than
BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN on entry.