On Xilinx Zynq-7000 SoC devices, physical modification of an SD boot image allows for a…
Priority LOW 29CWE-345Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-345.
Summary
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.
Why it matters now
EPSS 0.00186 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:amd:xilinx_z-7012s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7012s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7014s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7014s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7010_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7010:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7015_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7015:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7020_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7020:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
- cpe:2.3:o:amd:xilinx_z-7012s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7012s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7014s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7014s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7010_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7010:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7015_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7015:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7020_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7020:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:amd:xilinx_z-7030_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7030:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7035_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7035:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7045_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7045:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7100_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
| cpe:2.3:o:amd:xilinx_z-7007s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | AMD |
| cpe:2.3:h:amd:xilinx_z-7007s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AMD |
- cpe:2.3:o:amd:xilinx_z-7030_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7030:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7035_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7035:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7045_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7045:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7100_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
- cpe:2.3:o:amd:xilinx_z-7007s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·AMD
- cpe:2.3:h:amd:xilinx_z-7007s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AMD
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-44850
- 2026-10-03 Alias added: GHSA-63r5-j25f-4c6v
References
Sources
- CVE-2021-44850 · CVE Program
- CVE-2021-44850 · NVD
- FIRST EPSS
- GHSA-63r5-j25f-4c6v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences