CVE-2021-30184: fedoraproject fedora Classic Buffer Overflow
Vulnerability summary
CVE-2021-30184 is a high (CVSS 7.8) Classic Buffer Overflow vulnerability in fedoraproject fedora. EPSS estimates a 1.77% chance of exploitation in the next 30 days, higher than 77.8% of scored vulnerabilities. 2 public exploits are recorded.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 07-04-2021PublishedVulnerability first disclosed.
- 12-01-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.77%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
0.00 pp
From 1.77% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (lists.gnu.org)
Maturity: unknown
Exploit Reference (lists.gnu.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Mageia2 products
- gnuchess< 6.2.6-1.1.mga7
- gnuchess< 6.2.7-1.1.mga8
Debian1 product
- gnuchess< 6.2.7-1+deb12u1 | < 6.2.9-0.1 | < 6.2.7-1+deb11u1
Fedoraproject1 product
- fedoraEOL32 | 33 | 34
Gnu1 product
- chess6.2.7
Ubuntu1 product
- gnuchess< 6.2.7-1+deb11u1build0.22.04.1 | < 6.2.7-1+deb11u1build0.24.04.1
5 vendors · 6 products
References
14 links- lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00000.htmlX Refsource MISCREPORTExploitMailing ListPatchVendor Advisory
- lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00001.htmlX Refsource MISCREPORTExploitMailing ListVendor Advisory
