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No exploitation reportedFix available

CVE-2021-30184

No exploitation reported by the sources we read.

  • Published2021-04-07
  • WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

GNU Chess 6.2.7 allows attackers to execute arbitrary code via crafted PGN (Portable Game Notation) data. This is related to a buffer overflow in the use of a .tmp.epd temporary file in the cmd_pgnload and cmd_pgnreplay functions in frontend/cmd.cc.

Timeline

dates in UTC
  1. 2021-04-0712:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
32.x= 32no fix published
33.x= 33no fix published
34.x= 34no fix published
Gnu chess
BranchAffectedFixed in
6.2= 6.2.7no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gnuchessUbuntu:24.04:LTSall versions · fixed in 6.2.7-1+deb11u1build0.24.04.1
  • gnuchessUbuntu:22.04:LTSall versions · fixed in 6.2.7-1+deb11u1build0.22.04.1
  • gnuchessopenSUSE:Tumbleweedall versions · fixed in 6.2.9-1.2
  • gnuchessMageia:8all versions · fixed in 6.2.7-1.1.mga8
  • gnuchessMageia:7all versions · fixed in 6.2.6-1.1.mga7
  • gnuchessDebian:14all versions · fixed in 6.2.9-0.1
  • gnuchessDebian:13all versions · fixed in 6.2.9-0.1
  • gnuchessDebian:12all versions · fixed in 6.2.7-1+deb12u1

12 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-30184 Red Hat Product Security

    gnuchess: buffer overflows in the cmd_pgnload() and cmd_pgnreplay() functions in frontend/cmd.cc

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-04-07
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-x7m2-6mfm-whq5

Frequently asked questions

What is CVE-2021-30184?

GNU Chess 6.2.7 allows attackers to execute arbitrary code via crafted PGN (Portable Game Notation) data. This is related to a buffer overflow in the use of a .tmp.epd temporary file in the cmd_pgnload and cmd_pgnreplay functions in frontend/cmd.cc.

Is CVE-2021-30184 actively exploited?

Active exploitation of CVE-2021-30184 has not been confirmed. Its EPSS score was 1.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-30184?

CVE-2021-30184 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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