Bug 2348121 (CVE-2022-49500) - CVE-2022-49500 kernel: wl1251: dynamically allocate memory used for DMA
Summary: CVE-2022-49500 kernel: wl1251: dynamically allocate memory used for DMA
Keywords:
Status: NEW
Alias: CVE-2022-49500
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-26 03:18 UTC by OSIDB Bzimport
Modified: 2025-02-26 16:00 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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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
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