Bug 2355431 (CVE-2023-52988)

Summary: CVE-2023-52988 kernel: ALSA: hda/via: Avoid potential array out-of-bound in add_secret_dac_path()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A vulnerability was found in the Linux kernel's ALSA subsystem in the `add_secret_dac_path()` function, where improper array handling can lead to out-of-bounds access. This occurs if the return value of the call to `snd_hda_get_connections()` returns an error code (a negative number), which is stored in the variable `nums` that is then used as the upper bound of a for loop used to access the `conn` structure. This issue could lead to undefined behavior or a memory crash due to invalid memory access.
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Description OSIDB Bzimport 2025-03-27 17:01:12 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ALSA: hda/via: Avoid potential array out-of-bound in add_secret_dac_path()

snd_hda_get_connections() can return a negative error code.
It may lead to accessing 'conn' array at a negative index.

Found by Linux Verification Center (linuxtesting.org) with SVACE.
Comment 1 Robb Gatica 2025-03-28 02:14:54 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032708-CVE-2023-52988-5520@gregkh/T