CVE-2008-3964

Q: How do I fix CVE-2008-3964?

Upgrade libpng to 1.2.32 or later.

Q: Is CVE-2008-3964 being actively exploited?

Not that we know of. CVE-2008-3964 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 88% of all scored CVEs.

Q: How severe is CVE-2008-3964?

CVE-2008-3964 has a CVSS v2 base score of 4.3, rated medium. 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.

Q: What does CVE-2008-3964 affect?

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

MEDIUMEPSS 88th pctl

4.3

CVSS v2

NVD

Description

Multiple off-by-one errors in libpng before 1.2.32beta01, and 1.4 before 1.4.0beta34, allow context-dependent attackers to cause a denial of service (crash) or have unspecified other impact via a PNG image with crafted zTXt chunks, related to (1) the png_push_read_zTXt function in pngread.c, and possibly related to (2) pngtest.c.

CWE-193

How to fix

Remediation Available

libpngNVD

Affected:< 1.2.32Fixed in:1.2.32CVE-2008-3964derived from NVD

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 v2 Vector

No CVSS vector data available.

Exploit Intelligence

3.34%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch1

sourceforge.net

Exploit1

sourceforge.net

Third-Party Advisory13

Other references6

Related Vulnerabilities

Other CWE-193 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-3156	High	7.8	99%	KEV	Fix
CVE-2003-0466	Critical	9.8	78%	-	-
CVE-2023-44444	High	7.8	56%	-	Fix
CVE-2021-23017	High	7.7	53%	-	Fix
CVE-2023-28709	High	7.5	50%	-	Fix
CVE-2018-8828	Critical	9.8	31%	-	Fix

Common questions

How do I fix CVE-2008-3964?

Upgrade libpng to 1.2.32 or later.

Is CVE-2008-3964 being actively exploited?

Not that we know of. CVE-2008-3964 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 88% of all scored CVEs.

How severe is CVE-2008-3964?

CVE-2008-3964 has a CVSS v2 base score of 4.3, rated medium. 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-2008-3964 affect?

Published advisories record a fix for libpng (NVD). 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 2026-04-23.