What’s Vulnerable › Vulnerabilities

CVE-2022-50876: usb: musb: Fix musb_gadget.c rxstate overflow bug

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-30 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: usb: musb: Fix musb_gadget.c rxstate overflow bug The usb function device call musb_gadget_queue() adds the passed request to musb_ep::req_list,If the (request->length > musb_ep->packet_sz) and (is_buffer_mapped(req) return false),the rxstate() will copy all data in fifo to request->buf which may cause request->buf out of bounds. Fix it by add the length check : fifocnt = min_t(unsigned, request->length - request->actual, fifocnt);

Affected products

• Linux kernel: 4.3 — fixed in 6.1

How to fix

Upgrade to a fixed version: Linux kernel 6.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3c84c7f592c4ba38f54ddaddd0115acc443025db
• https://git.kernel.org/stable/c/523313881f0aa5cbbdb548ce575b6e58b202bd76
• https://git.kernel.org/stable/c/7c80f3a918ba9aa26fb699ee887064ec3af0396a
• https://git.kernel.org/stable/c/826f84ab04a5cafe484ea9c2c85a3930068e5cb7
• https://git.kernel.org/stable/c/a1008c8b9f357691ce6a8fdb8f157aecb2d79167
• https://git.kernel.org/stable/c/a9ccd2ab1becf5dcb6d57e9fcd981f5eaa606c96
• https://git.kernel.org/stable/c/acf0006f2b2b2ca672988875fd154429aafb2a9b
• https://git.kernel.org/stable/c/d6afcab1b48f4051211c50145b9e91be3b1b42c9
• https://git.kernel.org/stable/c/eea4c860c3b366369eff0489d94ee4f0571d467d

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