CVE-2008-1389: libclamav/chmunpack.c in the chm-parser in ClamAV before 0.94 allows remote attackers to cause a denial of ser

Q: How do I fix CVE-2008-1389?

clamav: upgrade to newer than 0.93.3. Exact commands for each OS are on this page.

Q: Is CVE-2008-1389 being exploited?

CVE-2008-1389 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-2008-1389 affect?

CVE-2008-1389 affects clamav. Severity is medium (CVSS 5.0). libclamav/chmunpack.c in the chm-parser in ClamAV before 0.94 allows remote attackers to cause a denial of service (application crash) via a malformed CHM file, related to an "invalid memory access."

Q: How urgent is CVE-2008-1389?

Priority 40/100. No elevated risk signals yet.

This month

MEDIUM 5.0UPGRADE

CVE-2008-1389 is a medium-severity flaw (CVSS 5.0) affecting clamav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libclamav/chmunpack.c in the chm-parser in ClamAV before 0.94 allows remote attackers to cause a denial of service (application crash) via a malformed CHM file, related to an "invalid memory access."

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Weakness	CWE-399
Published	2008-09-04
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

2008-09-04 16:41 UTCPublished CVE record published
2026-06-16 22:51 UTCUpdated Record last modified

clam anti-virus clamav UPGRADE

Affected: <= 0.93.3 · 0.11 · 0.12 · 0.13 · 0.14 · 0.14 pre · 0.15 · 0.20

Fixed in: newer than 0.93.3

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 0.93.3 (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.

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-2008-1389?

clamav: upgrade to newer than 0.93.3. Exact commands for each OS are on this page.

Is CVE-2008-1389 being exploited?

CVE-2008-1389 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-2008-1389 affect?

CVE-2008-1389 affects clamav. Severity is medium (CVSS 5.0). libclamav/chmunpack.c in the chm-parser in ClamAV before 0.94 allows remote attackers to cause a denial of service (application crash) via a malformed CHM file, related to an "invalid memory access."

How urgent is CVE-2008-1389?

Priority 40/100. No elevated risk signals yet.

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References

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