CVE-2011-2764: The FS_CheckFilenameIsNotExecutable function in qcommon/files.c in the ioQuake3 engine 1.36 and earlier, as us

Q: How do I fix CVE-2011-2764?

ioquake3 engine: upgrade to newer than 1.36; openarena: mitigate or apply the listed mitigation; smokin\' guns: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2011-2764 being exploited?

CVE-2011-2764 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-2011-2764 affect?

CVE-2011-2764 affects ioquake3 engine, openarena, smokin\' guns. Severity is high (CVSS 10.0). The FS_CheckFilenameIsNotExecutable function in qcommon/files.c in the ioQuake3 engine 1.36 and earlier, as used in World of Padman, Smokin' Guns, OpenArena, Tremulous, and ioUrbanTerror, does not properly determine dangerous file extension

Q: How urgent is CVE-2011-2764?

Priority 64/100. Critical severity; EPSS top 5%: very likely to be exploited; Public exploit reference

This week

HIGH 10.0UPGRADEMITIGATEMITIGATE

CVE-2011-2764 is a high-severity flaw (CVSS 10.0) affecting ioquake3 engine, openarena, smokin\' guns. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The FS_CheckFilenameIsNotExecutable function in qcommon/files.c in the ioQuake3 engine 1.36 and earlier, as used in World of Padman, Smokin' Guns, OpenArena, Tremulous, and ioUrbanTerror, does not properly determine dangerous file extensions, which allows remote attackers to execute arbitrary code via a crafted third-party addon that creates a Trojan horse DLL file.

Why this priority

Critical severity
EPSS top 5%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	8.7% (top 5%)
CISA exploited list	No
Weakness	CWE-20
Published	2011-08-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ioquake3 · openarena · smokin-guns · tremulous · urbanterror · worldofpadman

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

Am I affected?

Timeline

2011-08-04 02:45 UTCPublished CVE record published
2026-06-16 23:31 UTCUpdated Record last modified

ioquake3 ioquake3 engine UPGRADE

Affected: <= 1.36 · 1.36 rc1

Fixed in: newer than 1.36

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ioquake3-engine || rpm -q ioquake3-engine || ioquake3-engine --version

2. UPGRADE to newer than 1.36 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ioquake3-engine

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ioquake3-engine

Note

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

openarena openarena MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

smokin-guns smokin\' guns MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy smokin-guns || rpm -q smokin-guns || smokin-guns --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

tremulous tremulous MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

urbanterror iourbanterror MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

worldofpadman world of padman MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy world-of-padman || rpm -q world-of-padman || world-of-padman --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2011-2764?

ioquake3 engine: upgrade to newer than 1.36; openarena: mitigate or apply the listed mitigation; smokin\' guns: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-2764 being exploited?

CVE-2011-2764 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-2011-2764 affect?

CVE-2011-2764 affects ioquake3 engine, openarena, smokin\' guns. Severity is high (CVSS 10.0). The FS_CheckFilenameIsNotExecutable function in qcommon/files.c in the ioQuake3 engine 1.36 and earlier, as used in World of Padman, Smokin' Guns, OpenArena, Tremulous, and ioUrbanTerror, does not properly determine dangerous file extension

How urgent is CVE-2011-2764?

Priority 64/100. Critical severity; EPSS top 5%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2012-3345 MEDIUM 5.6 UPGRADE ioquake3 before r2253 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/ioq3.pi
CVE-2011-3012 HIGH 10.0 MITIGATE DOWNGRADE The ioQuake3 engine, as used in World of Padman 1.2 and earlier, Tremulous 1.1.0, and ioUrbanTerror 2007-12-20
CVE-2011-1412 HIGH 7.5 MITIGATE DOWNGRADE sys/sys_unix.c in the ioQuake3 engine on Unix and Linux, as used in World of Padman 1.5.x before 1.5.1.1 and O
CVE-2010-5077 HIGH 7.8 UPGRADE MITIGATE server/sv_main.c in Quake3 Arena, as used in ioquake3 before r1762, OpenArena, Tremulous, and other products,

References

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