CVE-2018-11489

HIGHEPSS 84th pctl

8.8

CVSS v3

Description

The DGifDecompressLine function in dgif_lib.c in GIFLIB (possibly version 3.0.x), as later shipped in cgif.c in sam2p 0.49.4, has a heap-based buffer overflow because a certain CrntCode array index is not checked. This will lead to a denial of service or possibly unspecified other impact.

CWE-129 CWE-787Out-of-bounds Write

How to fix

Remediation Available

giflibDebian

Fixed in:4.1.4-1CVE-2018-11489

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

2.56%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Exploit1

github.com

Third-Party Advisory1

securityfocus.com

Other references1

lists.apache.org

Related Vulnerabilities

Other CWE-129 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-35592	Medium	6.3	52%	-	Fix
CVE-2021-35598	Medium	6.3	51%	-	Fix
CVE-2021-35594	Medium	6.3	51%	-	Fix
CVE-2022-35737	High	7.5	21%	-	Fix
CVE-2014-6317	High	7.1	18%	-	-
CVE-2023-0755	Critical	9.8	12%	-	-

Common questions

How do I fix CVE-2018-11489?

Upgrade giflib on debian 12 to 4.1.4-1 or later.

Is CVE-2018-11489 being actively exploited?

Not that we know of. CVE-2018-11489 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.6% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.

How severe is CVE-2018-11489?

CVE-2018-11489 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-11489 affect?

Published advisories record a fix for giflib (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.