CVE-2006-2971: Integer overflow in the recv_packet function in 0verkill 0.16 allows remote attackers to cause a denial of ser

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MEDIUM 5.0DOWNGRADE

CVE-2006-2971 is a medium-severity flaw (CVSS 5.0) affecting overkill. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer overflow in the recv_packet function in 0verkill 0.16 allows remote attackers to cause a denial of service (daemon crash) via a UDP packet with fewer than 12 bytes, which results in a long length value to the crc32 function.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	4.5% (top 8%)
CISA exploited list	No
Published	2006-06-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: overkill

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

Am I affected?

Timeline

2006-06-12 20:06 UTCPublished CVE record published
2026-06-16 22:26 UTCUpdated Record last modified

overkill overkill DOWNGRADE

Affected: 0.16

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.16

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.16 (Debian / Ubuntu)

apt-cache madison overkill sudo apt install overkill=<VERSION_BEFORE_0.16> sudo apt-mark hold overkill

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

dnf --showduplicates list overkill sudo dnf downgrade overkill-<VERSION_BEFORE_0.16> sudo dnf versionlock add overkill

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.

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: 0verkill 0.16 - ASCII-ART Game Remote Integer Overflow Crash (PoC)

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-2006-2971?

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

Is CVE-2006-2971 being exploited?

CVE-2006-2971 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-2006-2971 affect?

CVE-2006-2971 affects overkill. Severity is medium (CVSS 5.0). Integer overflow in the recv_packet function in 0verkill 0.16 allows remote attackers to cause a denial of service (daemon crash) via a UDP packet with fewer than 12 bytes, which results in a long length value to the crc32 function.

How urgent is CVE-2006-2971?

Priority 45/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2009-5041 CRITICAL 9.8 UPGRADE overkill has buffer overflow via long player names that can corrupt data on the server machine

References

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