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Vulnerability record · CVE-2020-25125 · published 3 September 2020

CVE-2020-25125: Gnupg classic buffer overflow vulnerability

Gnupg · Gnupg

GnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly unspecified other impact, when a victim imports an attacker's OpenPGP key, and this key has AEAD preferences. The overflow is caused by a g10/key-check.c error. NOTE: GnuPG 2.3.x is unaffected. GnuPG 2.2.23 is a fixed version.

7.8 CVSS 3.1 High EPSS 1.3% · top 31.1% CWE-120 · Classic buffer overflow
7.8CVSS 3.1 base score, v2 6.8
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

GnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly unspecified other impact, when a victim imports an attacker's OpenPGP key, and this key has AEAD preferences. The overflow is caused by a g10/key-check.c error. NOTE: GnuPG 2.3.x is unaffected. GnuPG 2.2.23 is a fixed version.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2020/09/03/4 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/09/03/5 Mailing ListThird Party Advisory
https://bugzilla.opensuse.org/show_bug.cgi?id=1176034 ExploitIssue TrackingThird Party Advisory
https://dev.gnupg.org/T5050 Mailing List
https://dev.gnupg.org/rG8ec9573e57866dda5efb4677d4454161517484bc PatchVendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2020q3/000448.html Vendor Advisory
http://www.openwall.com/lists/oss-security/2020/09/03/4 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/09/03/5 Mailing ListThird Party Advisory
https://bugzilla.opensuse.org/show_bug.cgi?id=1176034 ExploitIssue TrackingThird Party Advisory
https://dev.gnupg.org/T5050 Mailing List
https://dev.gnupg.org/rG8ec9573e57866dda5efb4677d4454161517484bc PatchVendor Advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2020q3/000448.html Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-25125), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.