Bug 2348121 (CVE-2022-49500)

Summary:	CVE-2022-49500 kernel: wl1251: dynamically allocate memory used for DMA
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:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2025-02-26 03:18:20 UTC

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

wl1251: dynamically allocate memory used for DMA

With introduction of vmap'ed stacks, stack parameters can no
longer be used for DMA and now leads to kernel panic.

It happens at several places for the wl1251 (e.g. when
accessed through SDIO) making it unuseable on e.g. the
OpenPandora.

We solve this by allocating temporary buffers or use wl1251_read32().

Tested on v5.18-rc5 with OpenPandora.

Comment 1 Avinash Hanwate 2025-02-26 11:31:01 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022607-CVE-2022-49500-2b04@gregkh/T

Comment 2 Avinash Hanwate 2025-02-26 16:00:41 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022607-CVE-2022-49500-2b04@gregkh/T