Bug 2486995 (CVE-2026-46332)

Summary:	CVE-2026-46332 kernel: greybus: gb-beagleplay: bound bootloader receive buffering
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
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 Greybus subsystem, specifically in the `gb-beagleplay` driver. The `cc1352_bootloader_rx()` function, responsible for receiving bootloader data, does not properly check the size of incoming data chunks before copying them into a fixed-size receive buffer. This unbounded buffering can lead to an `rx_buffer` overflow, potentially resulting in memory corruption and a denial of service.	Story Points:	---
Clone Of:		Environment:
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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 2026-06-09 14:01:18 UTC

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

greybus: gb-beagleplay: bound bootloader receive buffering

cc1352_bootloader_rx() appends each serdev chunk into the fixed
rx_buffer before parsing bootloader packets. The helper can keep
leftover bytes between callbacks and may receive multiple packets in one
callback, so a single count value is not constrained by one packet
length.

Check that the incoming chunk fits in the remaining receive buffer space
before memcpy(). If it does not, drop the staged data and consume the
bytes instead of overflowing rx_buffer.

Comment 1 Keith Grant 2026-06-09 16:45:37 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026060911-CVE-2026-46332-c9a0@gregkh/T