CVE-2022-23822

Authentication bypass via unauthenticated PHT reuse

Published Apr 27, 2022 · Updated Sep 16, 2024

Authentication bypass in AMD Zynq-7000 SoC FSBL 2021.2 through 2022.1 allows attackers to load malicious images via physical access. The FSBL retrieves partition header table data twice and then uses the second, unauthenticated copy when validating boot content. Physical possession and precise manipulation of boot storage are required, enabling execution of unauthorized code and potential decryption-oracle use.

CVSS severity6.8
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in AMD Zynq-7000 SoC FSBL 2021.2 through 2022.1 allows attackers to load malicious images via physical access. The FSBL retrieves partition header table data twice and then uses the second, unauthenticated copy when validating boot content. Physical possession and precise manipulation of boot storage are required, enabling execution of unauthorized code and potential decryption-oracle use.

The record

CVE
CVE-2022-23822
Published
Apr 27, 2022
Updated
Sep 16, 2024
Vendor
AMD
Product
Zynq-7000 SoC FSBL
Classifications
CWE-863, T1542.001
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2021.2 <=2022.1

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

AMD · Zynq-7000 SoC FSBLversion=2021.2 <=2022.1

Published CVSS scores

6.8NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.4NVDAV:L/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1542.001Pre-OS Boot: System Firmware

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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