CVE catalog

CVE-2021-43518

teeworlds: CVE-2021-43518

Severity: Medium · CVSS 6.4CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H
Published: Dec 15, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.43% · Oct 25, 2026

Teeworlds up to and including 0.7.5 is vulnerable to Buffer Overflow. A map parser does not validate m_Channels value coming from a map file, leading to a buffer overflow. A malicious server may offer a specially crafted map that will overwrite client's stack causing denial of service or code execution.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	teeworlds	sid	`0.7.5-3`	fixed
Debian	teeworlds	forky	`0.7.5-3`	fixed
Debian	teeworlds	trixie	`0.7.5-2`	fixed
Debian	teeworlds	bookworm	`0.7.5-2`	fixed
Ubuntu	teeworlds	20.04	`0.7.2-5`	vulnerable
Ubuntu	teeworlds	20.04	`0.7.2-5ubuntu1`	vulnerable
Ubuntu	teeworlds	20.04	`0.7.2-5ubuntu1.1`	vulnerable
Ubuntu	teeworlds	22.04	`0.7.5-1`	vulnerable
Ubuntu	teeworlds	24.04	`0.7.5-2`	fixed
Ubuntu	teeworlds	25.10	`0.7.5-2`	fixed
Ubuntu	teeworlds	26.04	`0.7.5-2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	teeworlds	source	sid	`0.7.5-2`	not yet assigned	Not reported	[1009070]
Debian	teeworlds	source	forky	`0.7.5-2`	not yet assigned	Not reported	[1009070]
Debian	teeworlds	source	trixie	`0.7.5-2`	not yet assigned	Not reported	[1009070]
Debian	teeworlds	source	bookworm	`0.7.5-2`	not yet assigned	Not reported	[1009070]
Ubuntu	teeworlds	deb	24.04	`0.7.5-2`	Not reported	UBUNTU-CVE-2021-43518	Not reported
Ubuntu	teeworlds	deb	25.10	`0.7.5-2`	Not reported	UBUNTU-CVE-2021-43518	Not reported
Ubuntu	teeworlds	deb	26.04	`0.7.5-2`	Not reported	UBUNTU-CVE-2021-43518	Not reported

[Debian bug #1009070]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[teeworlds]Fixed
Details (2)
- 0.7.5-2 · amd64 · bookworm
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · bookworm; dsa · teeworlds · debian · 12
- 0.7.5-2 · arm64 · bookworm
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · bookworm; dsa · teeworlds · debian · 12
[teeworlds-data]Fixed
Source package: [teeworlds]
Details (2)
- 0.7.5-2 · all · bookworm
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · bookworm; dsa · teeworlds · debian · 12
- 0.7.5-2 · all · bookworm
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · bookworm; dsa · teeworlds · debian · 12
[teeworlds-server]Fixed
Source package: [teeworlds]
Details (2)
- 0.7.5-2 · amd64 · bookworm
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · bookworm; dsa · teeworlds · debian · 12
- 0.7.5-2 · arm64 · bookworm
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · bookworm; dsa · teeworlds · debian · 12

[Debian 13 (Trixie)]

[teeworlds]Fixed
Source package: [teeworlds]
Details (2)
- 0.7.5-2+b1 · amd64 · trixie
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · 13
- 0.7.5-2+b2 · arm64 · trixie
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · 13
[teeworlds-data]Fixed
Source package: [teeworlds]
Details (2)
- 0.7.5-2 · all · trixie
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · 13
- 0.7.5-2 · all · trixie
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · 13
[teeworlds-server]Fixed
Source package: [teeworlds]
Details (2)
- 0.7.5-2+b1 · amd64 · trixie
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · 13
- 0.7.5-2+b2 · arm64 · trixie
  Fixed · Fixed: 0.7.5-2
  dsa · teeworlds · debian · 13

Observed: Oct 23, 2026, 6:03:20 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]