CVE-2025-31177Public exploit

Process interruption via malformed UTF-8 rendering

Published May 7, 2025 · Updated Jun 25, 2026

Heap-based buffer overflow in Gnuplot before 6.0 allows local users to terminate the process through malformed UTF-8 plot input. In term/dumb.trm, utf8_copy_one performs a four-byte write beyond the allocated terminal character grid while the dumb terminal renders invalid UTF-8. Exploitation requires local processing of a crafted plot file; the demonstrated consequence is process termination, with no reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Gnuplot before 6.0 allows local users to terminate the process through malformed UTF-8 plot input. In term/dumb.trm, utf8_copy_one performs a four-byte write beyond the allocated terminal character grid while the dumb terminal renders invalid UTF-8. Exploitation requires local processing of a crafted plot file; the demonstrated consequence is process termination, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2025-31177
Published
May 7, 2025
Updated
Jun 25, 2026
Vendor
Gnuplot
Product
Gnuplot
Classifications
CWE-122
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record 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=0 <6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Gnuplot · Gnuplotversion=0 <6.0

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based 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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