CVE-2020-8432Network attack vector

Arbitrary code execution via GPT rename double free

Published Jan 29, 2020 · Updated Aug 4, 2024

A double-free vulnerability in Das U-Boot through 2020.01 allows remote attackers to execute arbitrary code via crafted GPT partition rename input. The cmd/gpt.c do_rename_gpt_parts() function frees the same allocation twice while processing partition-name data, enabling a write-what-where condition. Exploitation requires access to the U-Boot GPT rename command; successful corruption can overwrite attacker-chosen memory and transfer execution.

CVSS severity9.8
Critical
EPSS probability3.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A double-free vulnerability in Das U-Boot through 2020.01 allows remote attackers to execute arbitrary code via crafted GPT partition rename input. The cmd/gpt.c do_rename_gpt_parts() function frees the same allocation twice while processing partition-name data, enabling a write-what-where condition. Exploitation requires access to the U-Boot GPT rename command; successful corruption can overwrite attacker-chosen memory and transfer execution.

The record

CVE
CVE-2020-8432
Published
Jan 29, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415, CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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