CVE-2017-1000421

CRITICALNVD 9.8

9.8

Gifsicle gifview 1.89 and older is vulnerable to a use-after-free in the read_gif function resulting potential code execution

CVSS v3: 9.8
EG Score: —
EPSS: 66.0%
KEV: Not listed

Published

January 2, 2018

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated May 23, 2026

No patch confirmed yet.

generic

[SECURITY] [DSA 4084-1] gifsicle security update

https://www.debian.org/security/2018/dsa-4084

generic

[SECURITY] [DLA 1233-1] gifsicle security update

https://lists.debian.org/debian-lts-announce/2018/01/msg00006.html

generic

Use-After-Free bug in gifview (tested with the latest version 1.89) · Issue #114 · kohler/gifsicle · GitHub

https://github.com/kohler/gifsicle/issues/114

Weakness Classification(1)

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

CWE-416Use After Free

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 02:14 UTCOSV refresh
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:44 UTCepss_batch

Frequently asked(5)

What is CVE-2017-1000421?

CVE-2017-1000421 is a critical vulnerability published on January 2, 2018. Gifsicle gifview 1.89 and older is vulnerable to a use-after-free in the read_gif function resulting potential code execution

When was CVE-2017-1000421 disclosed?

CVE-2017-1000421 was first published in the National Vulnerability Database on January 2, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2017-1000421 actively exploited?

CVE-2017-1000421 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 66.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2017-1000421?

CVE-2017-1000421 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2017-1000421?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-1000421, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-1000421

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CVE-2017-1000421

📅 Published

🔄 Last Modified

📋 Advisory Details (3)

[SECURITY] [DSA 4084-1] gifsicle security update

[SECURITY] [DLA 1233-1] gifsicle security update

Use-After-Free bug in gifview (tested with the latest version 1.89) · Issue #114 · kohler/gifsicle · GitHub

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2017-1000421?

Published

Last Modified

Advisory Details (3)

Frequently asked(5)