CVE-2008-1670: Heap-based buffer overflow in the progressive PNG Image loader (decoders/pngloader.cpp) in KHTML in KDE 4.0.x

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HIGH 9.3MITIGATE

CVE-2008-1670 is a high-severity flaw (CVSS 9.3) affecting kde. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in the progressive PNG Image loader (decoders/pngloader.cpp) in KHTML in KDE 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted image.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.3 (High)
EPSS exploit chance	4.8% (top 8%)
CISA exploited list	No
Weakness	CWE-119
Published	2008-04-28
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: kde

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2008-04-28 17:05 UTCPublished CVE record published
2026-06-16 22:52 UTCUpdated Record last modified

kde kde MITIGATE

Affected: 4.0.0 · 4.0.1 · 4.0.2 · 4.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2008-1670?

kde: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2008-1670 being exploited?

CVE-2008-1670 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2008-1670 affect?

CVE-2008-1670 affects kde. Severity is high (CVSS 9.3). Heap-based buffer overflow in the progressive PNG Image loader (decoders/pngloader.cpp) in KHTML in KDE 4.0.x up to 4.0.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted image.

How urgent is CVE-2008-1670?

Priority 56/100. Critical severity; EPSS top 8%: very likely to be exploited

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References

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