Bug 2516831 (CVE-2026-74333)

Summary: CVE-2026-74333 kernel: ASoC: amd: acp-sdw-legacy: Bound DAI link iteration
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's ASoC AMD ACP SoundWire (SDW) legacy driver. The `create_sdw_dailinks` function incorrectly iterates over an array, causing it to read beyond its allocated memory boundary. This out-of-bounds read can lead to memory corruption, potentially impacting system stability.
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Description OSIDB Bzimport 2026-08-15 06:35:45 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: amd: acp-sdw-legacy: Bound DAI link iteration

create_sdw_dailinks() walks soc_dais until it finds an entry with
initialised cleared, but soc_dais is allocated with exactly num_ends
entries. If all entries are initialised, the loop reads past the end of
the array.

This was reported by KASAN:

  BUG: KASAN: slab-out-of-bounds in mc_probe+0x26b3/0x2774 [snd_acp_sdw_legacy_mach]
  Read of size 1

Pass the allocated entry count to create_sdw_dailinks() and stop before
reading past the array.
Comment 1 Keith Grant 2026-08-20 17:38:50 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081556-CVE-2026-74333-6d02@gregkh/T