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CVE-2025-38729 is an out-of-bounds memory-access vulnerability in the Linux kernel ALSA USB-audio subsystem. UAC3 power-domain descriptors contain a variable-length bLength field that was not adequately validated before descriptor processing. A malicious USB Audio Class 3 device or firmware can provide a malformed power-domain descriptor whose length causes the kernel to access memory outside the expected descriptor bounds. The fix validates UAC3 power-domain descriptors, including their variable bLength values, before use.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel ALSA USB-audio descriptor-validation flaw affecting UAC3 power-domain descriptors.
Linux kernel ALSA USB-audio vulnerability involving insufficient validation of UAC3 power-domain descriptors.
Linux kernel ALSA USB-audio flaw addressed by validating UAC3 power-domain descriptors.
Linux kernel ALSA USB-audio vulnerability involving insufficient validation of UAC3 power-domain descriptors.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.