What’s Vulnerable › Vulnerabilities

CVE-2021-30184

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-07 · updated 2026-06-17
• Weakness: CWE-120

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.

Affected products

• Fedoraproject Fedora: 32, 33, 34
• GNU Chess: 6.2.7

References

• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QC74RWMDLSQGV6Z3ZABNTPABB33S4YNF/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SOGPLC77ZL2FACSOE5MWDS3YH3RBNQAQ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXOTMUSBVUZNA3JMPG6BU37DQW2YOJWS/
• https://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00000.html
• https://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00001.html
• https://security.gentoo.org/glsa/202107-28
• https://lists.debian.org/debian-lts-announce/2025/01/msg00007.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QC74RWMDLSQGV6Z3ZABNTPABB33S4YNF/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SOGPLC77ZL2FACSOE5MWDS3YH3RBNQAQ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXOTMUSBVUZNA3JMPG6BU37DQW2YOJWS/
• https://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00000.html
• https://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00001.html

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