Gnuplot: gnuplot heap-buffer overflow on utf8_copy_one (CVE-2025-31177) | HOL Guard CVE

Medium · CVSS 5.5CVE-2025-31177

Gnuplot: gnuplot heap-buffer overflow on utf8_copy_one

Answer in brief

CVE-2025-31177 records a Medium severity (CVSS 5.5) vulnerability in Gnuplot: gnuplot heap-buffer overflow on utf8_copy_one. The current sources do not mark it as known exploited. Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 7, 2025Updated Jun 26, 2026Source checked Aug 5, 2026First seen by HOL Jun 26, 2026Material review Jun 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.5
Exploitation: Not marked as known exploited
Affected software: Not mapped
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Recommended response

Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

Published upstream
May 7, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 26, 2026

Sources and claim methodology

Upstream source description

gnuplot is affected by a heap buffer overflow at function utf8_copy_one.

Quoted source text, attributed separately from HOL analysis.

Back to active CVEs

Medium · CVSS 5.5CVE-2025-31177

Gnuplot: gnuplot heap-buffer overflow on utf8_copy_one

Answer in brief

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 7, 2025Updated Jun 26, 2026Source checked Aug 5, 2026First seen by HOL Jun 26, 2026Material review Jun 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.5
Exploitation: Not marked as known exploited
Affected software: Not mapped
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Recommended response

Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

Published upstream
May 7, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 26, 2026

Sources and claim methodology

Upstream source description

gnuplot is affected by a heap buffer overflow at function utf8_copy_one.

Quoted source text, attributed separately from HOL analysis.