CVE-2021-44850: AMD Xilinx Z-7007s Firmware

Medium severity, CVSS 6.8. EPSS: 0.2% chance of exploitation in the next 30 days.

On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a buffer overflow attack in the ROM. Because the Zynq-7000's boot image header is unencrypted and unauthenticated before use, an attacker can modify the boot header stored on an SD card so that a secure image appears to be unencrypted, and they will be able to modify the full range of register initialization values. Normally, these registers will be restricted when booting securely. Of importance to this attack are two registers that control the SD card's transfer type and transfer size. These registers could be modified a way that causes a buffer overflow in the ROM.

Affected products

• AMD Xilinx Z-7007s Firmware: affected versions not specified
• AMD Xilinx Z-7010 Firmware: affected versions not specified
• AMD Xilinx Z-7012s Firmware: affected versions not specified
• AMD Xilinx Z-7014s Firmware: affected versions not specified
• AMD Xilinx Z-7015 Firmware: affected versions not specified
• AMD Xilinx Z-7020 Firmware: affected versions not specified
• AMD Xilinx Z-7030 Firmware: affected versions not specified
• AMD Xilinx Z-7035 Firmware: affected versions not specified
• AMD Xilinx Z-7045 Firmware: affected versions not specified
• AMD Xilinx Z-7100 Firmware: affected versions not specified

Published 2022-02-10. Last modified 2026-06-17.