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CVE-2025-39760 is an out-of-bounds read vulnerability in the Linux kernel USB core configuration parser. The usb_parse_ss_endpoint_companion() function checks the type of a SuperSpeed endpoint companion descriptor before validating the available descriptor length. An insufficiently sized descriptor buffer can therefore cause access beyond its bounds. Processing malformed USB descriptors can potentially cause denial of service or information disclosure. The fix validates the descriptor size before accessing any descriptor fields.
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No public exploit code observed for this vulnerability.
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28 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An out-of-bounds read vulnerability in the Linux kernel's USB SuperSpeed endpoint companion descriptor parser. The parser checks the descriptor type before validating its length. The fix validates the size before accessing descriptor fields. The advisory assigns a CVSS v3 base score of 7.1, indicating local exploitation requiring low privileges, with potential confidentiality and availability impacts.
A vulnerability addressed by the referenced CentOS 6 security update.
A Linux kernel vulnerability that can cause denial of service via an out-of-bounds read in USB configuration parsing.
A Linux kernel denial-of-service vulnerability caused by an out-of-bounds read during USB configuration parsing.
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.