CVE-2021-27208

When booting a Zync-7000 SOC device from nand flash memory, the nand driver in the ROM does not validate the inputs when reading in any parameters in the nand’s parameter page. IF a field read in from the parameter page is too large, this causes a buffer overflow that could lead to arbitrary code execution. Physical access and modification of the board assembly on which the Zynq-7000 SoC device mounted is needed to replace the original NAND flash memory with a NAND flash emulation device for this attack to be successful.

• CWE-120

• http://www.onfi.org/specificationsNot Applicable
• https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.htmlProduct, Vendor Advisory
• https://www.xilinx.com/support/answers/76201.htmlVendor Advisory
• http://www.onfi.org/specificationsNot Applicable
• https://www.xilinx.com/products/silicon-devices/soc/zynq-7000.htmlProduct, Vendor Advisory
• https://www.xilinx.com/support/answers/76201.htmlVendor Advisory

Published

Mar 15, 2021

Last Modified

Jun 17, 2026

Status

Modified

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