CVE-2006-4438: Heap-based buffer overflow in SpIDer for Dr.Web Scanner for Linux 4.33, and possibly earlier versions, allows

Q: How do I fix CVE-2006-4438?

dr.web: upgrade to newer than 4.33_for_linux. Exact commands for each OS are on this page.

Q: Is CVE-2006-4438 being exploited?

CVE-2006-4438 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-2006-4438 affect?

CVE-2006-4438 affects dr.web. Severity is medium (CVSS 6.4). Heap-based buffer overflow in SpIDer for Dr.Web Scanner for Linux 4.33, and possibly earlier versions, allows remote attackers to execute arbitrary code via an LHA archive with an extended header that contains a long directory name.

Q: How urgent is CVE-2006-4438?

Priority 56/100. EPSS top 4%: very likely to be exploited; Public exploit reference; On your watchlist

This week

MEDIUM 6.4WATCHLISTUPGRADE

CVE-2006-4438 is a medium-severity flaw (CVSS 6.4) affecting dr.web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in SpIDer for Dr.Web Scanner for Linux 4.33, and possibly earlier versions, allows remote attackers to execute arbitrary code via an LHA archive with an extended header that contains a long directory name.

Why this priority

EPSS top 4%: very likely to be exploited
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	10.7% (top 4%)
CISA exploited list	No
Published	2006-09-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: doctor web ltd

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

Am I affected?

Timeline

2006-09-20 23:07 UTCPublished CVE record published
2026-06-16 22:29 UTCUpdated Record last modified

doctor web ltd dr.web UPGRADE

Affected: <= 4.33_for_linux

Fixed in: newer than 4.33_for_linux

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dr.web || rpm -q dr.web || dr.web --version

2. UPGRADE to newer than 4.33_for_linux (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dr.web

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dr.web

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: Dr.Web AntiVirus 4.33 - LHA long Directory name Local 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-2006-4438?

dr.web: upgrade to newer than 4.33_for_linux. Exact commands for each OS are on this page.

Is CVE-2006-4438 being exploited?

CVE-2006-4438 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-2006-4438 affect?

CVE-2006-4438 affects dr.web. Severity is medium (CVSS 6.4). Heap-based buffer overflow in SpIDer for Dr.Web Scanner for Linux 4.33, and possibly earlier versions, allows remote attackers to execute arbitrary code via an LHA archive with an extended header that contains a long directory name.

How urgent is CVE-2006-4438?

Priority 56/100. EPSS top 4%: very likely to be exploited; Public exploit reference; On your watchlist

References

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