CVE-2020-7464: Freebsd

Medium severity, CVSS 5.3. EPSS: 0.7% chance of exploitation in the next 30 days.

In FreeBSD 12.2-STABLE before r365730, 11.4-STABLE before r365738, 12.1-RELEASE before p10, 11.4-RELEASE before p4, and 11.3-RELEASE before p14, a programming error in the ure(4) device driver caused some Realtek USB Ethernet interfaces to incorrectly report packets with more than 2048 bytes in a single USB transfer as having a length of only 2048 bytes. An adversary can exploit this to cause the driver to misinterpret part of the payload of a large packet as a separate packet, and thereby inject packets across security boundaries such as VLANs.

Affected products

• Freebsd Freebsd: version 11.3 only; version 11.4 only; version 12.1 only; version 12.2 only

Published 2021-03-26. Last modified 2026-06-17.