CVE-2007-6335: Integer overflow in libclamav in ClamAV before 0.92 allows remote attackers to execute arbitrary code via a cr

Q: How do I fix CVE-2007-6335?

clamav: upgrade to newer than 0.92. Exact commands for each OS are on this page.

Q: Is CVE-2007-6335 being exploited?

CVE-2007-6335 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2007-6335 affect?

CVE-2007-6335 affects clamav. Severity is high (CVSS 7.5). Integer overflow in libclamav in ClamAV before 0.92 allows remote attackers to execute arbitrary code via a crafted MEW packed PE file, which triggers a heap-based buffer overflow.

Q: How urgent is CVE-2007-6335?

Priority 56/100. High severity; EPSS top 3%: very likely to be exploited; Public exploit reference

This week

HIGH 7.5UPGRADE

CVE-2007-6335 is a high-severity flaw (CVSS 7.5) affecting clamav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer overflow in libclamav in ClamAV before 0.92 allows remote attackers to execute arbitrary code via a crafted MEW packed PE file, which triggers a heap-based buffer overflow.

Why this priority

High severity
EPSS top 3%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	18.4% (top 3%)
CISA exploited list	No
Weakness	CWE-189
Published	2007-12-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: clam anti-virus

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

Am I affected?

Timeline

2007-12-20 01:46 UTCPublished CVE record published
2026-06-16 22:47 UTCUpdated Record last modified

clam anti-virus clamav UPGRADE

Affected: <= 0.92

Fixed in: newer than 0.92

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy clamav || rpm -q clamav || clamav --version

2. UPGRADE to newer than 0.92 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade clamav

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade clamav

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: ClamAV 0.91.2 - libclamav MEW PE Buffer Overflow

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-2007-6335?

clamav: upgrade to newer than 0.92. Exact commands for each OS are on this page.

Is CVE-2007-6335 being exploited?

CVE-2007-6335 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-2007-6335 affect?

CVE-2007-6335 affects clamav. Severity is high (CVSS 7.5). Integer overflow in libclamav in ClamAV before 0.92 allows remote attackers to execute arbitrary code via a crafted MEW packed PE file, which triggers a heap-based buffer overflow.

How urgent is CVE-2007-6335?

Priority 56/100. High severity; EPSS top 3%: very likely to be exploited; Public exploit reference

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References

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