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CVE-2025-39757 is a Linux kernel vulnerability in the ALSA USB-audio subsystem’s parsing of USB Audio Class 3 (UAC3) cluster segment descriptors. The subsystem did not adequately verify that descriptor sizes matched declared lengths and remained within allocated buffer bounds. Malicious USB audio firmware supplying malformed UAC3 descriptors can consequently trigger unexpected out-of-bounds memory accesses in kernel context.
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No public exploit code observed for this vulnerability.
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26 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel ALSA USB-audio flaw involving validation of UAC3 cluster segment descriptors. It affects Rocky Linux 10.0 kernel packages covered by CIQ advisory crlsa-2025_17776.
A Linux kernel ALSA USB-audio vulnerability concerning validation of UAC3 cluster segment descriptors, addressed by the Rocky Linux 9 security update advisory CRLSA-2025_17760.
A vulnerability addressed by the referenced CentOS 7 security advisory.
Referenced by the TuxCare CentOS 8.5 security advisory; no vulnerability details are provided.
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.