Bug 2482648 (CVE-2026-46122)

Summary:	CVE-2026-46122 kernel: wifi: b43: enforce bounds check on firmware key index in b43_rx()
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
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Doc Text:	A flaw was found in the Linux kernel's b43 Wi-Fi driver. A remote attacker could exploit this vulnerability by providing a specially crafted firmware key index that exceeds the allocated array size in the `b43_rx()` function. This out-of-bounds read could lead to information disclosure, potentially revealing sensitive data from kernel memory.	Story Points:	---
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Regression:	---	Mount Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-28 11:07:35 UTC

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

wifi: b43: enforce bounds check on firmware key index in b43_rx()

The firmware-controlled key index in b43_rx() can exceed the dev->key[]
array size (58 entries). The existing B43_WARN_ON is non-enforcing in
production builds, allowing an out-of-bounds read.

Make the B43_WARN_ON check enforcing by dropping the frame when the
firmware returns an invalid key index.

Comment 1 Keith Grant 2026-05-28 18:07:05 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052815-CVE-2026-46122-04ad@gregkh/T