Bug 2516910 (CVE-2026-74295)

Summary: CVE-2026-74295 kernel: ASoC: codecs: hdac_hdmi: Validate written enum value
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
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, specifically within the ASoC hdac_hdmi audio codec driver. This vulnerability occurs because the driver does not properly validate an input value used to access an internal data structure. A local attacker could provide a specially crafted input, causing the driver to read beyond its intended memory boundaries. This out-of-bounds read could potentially expose sensitive information from the system's memory.
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Description OSIDB Bzimport 2026-08-15 06:39:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: codecs: hdac_hdmi: Validate written enum value

hdac_hdmi_set_pin_port_mux() uses the written enum value to index the
texts array before calling snd_soc_dapm_put_enum_double(), which validates
that the value is within the enum item range.

An out-of-range value can therefore make the driver read past the texts
array before the helper rejects the write. Move the lookup after the helper
has accepted the value.
Comment 1 Keith Grant 2026-08-20 15:16:20 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081548-CVE-2026-74295-f398@gregkh/T