CVE-2026-74681

In the Linux kernel, the following vulnerability has been resolved: usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg ibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check in usbio_bulk_msg() compares it against txbuf_len — the bulk OUT endpoint size. Both are taken independently from different endpoints in usbio_probe(), so the check is wrong when they differ. Use rxbuf_len for the IN direction. This matches the buffer that actually holds the response data.

• https://git.kernel.org/stable/c/7e22c9f79b200672f3e477421b6c9050d8cf70a5
• https://git.kernel.org/stable/c/9ad0164f78b66b0b5eca3a5748cc94dd87e28124
• https://git.kernel.org/stable/c/ebfd1e82ab0a6d26efd9bdd89de899215851f5bf

Published

Aug 22, 2026

Last Modified

Aug 22, 2026

Status

Received

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