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CVE WatchAug 22, 2026

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_le

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 22, 2026 · Last modified: Aug 22, 2026

EPSS · 30d

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Technical description

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.

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