CVE-2021-32422Public exploitNetwork attack vector

Process crash via signed lexer table index

Published Aug 22, 2023 · Updated Oct 3, 2024

Global buffer over-read in dpic 2021.01.01 allows context-dependent attackers to crash the process with a crafted diagram input file. In theyylex() in main.c, a signed input byte can produce index 128 against the 128-entry entrytv and entryhp lexical tables. Processing the malicious file is required, and the demonstrated consequence is an AddressSanitizer-detected abort rather than data disclosure or code execution.

CVSS severity7.5
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Global buffer over-read in dpic 2021.01.01 allows context-dependent attackers to crash the process with a crafted diagram input file. In theyylex() in main.c, a signed input byte can produce index 128 against the 128-entry entrytv and entryhp lexical tables. Processing the malicious file is required, and the demonstrated consequence is an AddressSanitizer-detected abort rather than data disclosure or code execution.

The record

CVE
CVE-2021-32422
Published
Aug 22, 2023
Updated
Oct 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Public exploit references

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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