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CVE-2025-39760 is an out-of-bounds read in the Linux kernel USB core configuration parser, specifically usb_parse_ss_endpoint_companion(). The function checked a SuperSpeed endpoint companion descriptor's type before validating that the descriptor was large enough to contain the accessed field. A malformed or truncated descriptor could therefore cause the kernel to read beyond the available parsing buffer. The fix validates descriptor size before accessing descriptor fields.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
26 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.
A Linux kernel denial-of-service vulnerability caused by an out-of-bounds read during USB configuration parsing.
A Linux kernel denial-of-service vulnerability caused by an out-of-bounds read in 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.