Bug 2394601 (CVE-2025-39760)

Summary: CVE-2025-39760 kernel: usb: core: config: Prevent OOB read in SS endpoint companion parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-11 17:01:37 UTC 
In the Linux kernel, the following vulnerability has been resolved:

usb: core: config: Prevent OOB read in SS endpoint companion parsing

usb_parse_ss_endpoint_companion() checks descriptor type before length,
enabling a potentially odd read outside of the buffer size.

Fix this up by checking the size first before looking at any of the
fields in the descriptor.
Comment 1 Jon Moroney 2025-09-11 20:24:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091145-CVE-2025-39760-2d5f@gregkh/T