CVE-2019-19638

CRITICALNVD 9.89.8—

9.8

An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function load_pnm at frompnm.c, due to an integer overflow.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 68.0%
KEV: Not listed

Published

December 8, 2019

Last Modified

April 24, 2026

Advisory Details (1)

Auto-updated May 11, 2026

No patch confirmed yet.

generic

A heap-buffer-overflow found in function load_pnm at frompnm.c:289-50, due to integer overflow · Issue #102 · saitoha/libsixel · GitHub

https://github.com/saitoha/libsixel/issues/102

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
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2026-05-31 02:25 UTCOSV refresh
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2026-05-29 13:42 UTCepss_batch
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2026-05-22 21:16 UTCepss_batch

Frequently asked(5)

What is CVE-2019-19638?

CVE-2019-19638 is a critical vulnerability published on December 8, 2019. An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function load_pnm at frompnm.c, due to an integer overflow.

When was CVE-2019-19638 disclosed?

CVE-2019-19638 was first published in the National Vulnerability Database on December 8, 2019, with the most recent update on April 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-19638 actively exploited?

CVE-2019-19638 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 68.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-19638?

CVE-2019-19638 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2019-19638?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-19638, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-19638

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

A heap-buffer-overflow found in function load_pnm at frompnm.c:289-50, due to integer overflow · Issue #102 · saitoha/libsixel · GitHub

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-19638?

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Advisory Details (1)

Frequently asked(5)

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