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);

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History

Wed, 31 Dec 2025 12:15:00 +0000


Tue, 30 Dec 2025 12:45:00 +0000

Type Values Removed Values Added
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);
Title usb: musb: Fix musb_gadget.c rxstate overflow bug
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-01-02T15:05:10.481Z

Reserved: 2025-12-30T12:06:07.137Z

Link: CVE-2022-50876

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-30T13:16:02.610

Modified: 2025-12-31T20:43:05.160

Link: CVE-2022-50876

cve-icon Redhat

Severity :

Publid Date: 2025-12-30T00:00:00Z

Links: CVE-2022-50876 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses

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