CVE-2022-50876
Published Dec 30, 2025
Modified Apr 15, 2026
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);
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References
Other 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
Frequently Asked Questions
What is CVE-2022-50876? +
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);
How do I check if I'm vulnerable to CVE-2022-50876? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.