CVE-2005-3239: The OLE2 unpacker in clamd in Clam AntiVirus (ClamAV) 0.87-1 allows remote attackers to cause a denial of serv

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HIGH 7.8DOWNGRADE

CVE-2005-3239 is a high-severity flaw (CVSS 7.8) affecting clamav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The OLE2 unpacker in clamd in Clam AntiVirus (ClamAV) 0.87-1 allows remote attackers to cause a denial of service (segmentation fault) via a DOC file with an invalid property tree, which triggers an infinite recursion in the ole2_walk_property_tree function.

Why this priority

High severity
EPSS top 9%: very likely to be exploited

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

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	4.5% (top 9%)
CISA exploited list	No
Published	2005-10-14
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

2005-10-14 19:02 UTCPublished CVE record published
2026-06-16 22:16 UTCUpdated Record last modified

clam anti-virus clamav DOWNGRADE

Affected: .

Fixed in: no fixed release known

Safe to downgrade to: a release before .

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before . (Debian / Ubuntu)

apt-cache madison clamav sudo apt install clamav=<VERSION_BEFORE_.> sudo apt-mark hold clamav

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list clamav sudo dnf downgrade clamav-<VERSION_BEFORE_.> sudo dnf versionlock add clamav

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2005-3239?

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

Is CVE-2005-3239 being exploited?

CVE-2005-3239 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-2005-3239 affect?

CVE-2005-3239 affects clamav. Severity is high (CVSS 7.8). The OLE2 unpacker in clamd in Clam AntiVirus (ClamAV) 0.87-1 allows remote attackers to cause a denial of service (segmentation fault) via a DOC file with an invalid property tree, which triggers an infinite recursion in the ole2_walk_prope

How urgent is CVE-2005-3239?

Priority 50/100. High severity; EPSS top 9%: very likely to be exploited

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References

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