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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-090091 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2020-25125)

According to the versions of the gnupg2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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. (CVE-2020-25125)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the gnupg2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - 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. (CVE-2020-25125)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Importing an OpenPGP key having a preference list for AEAD algorithms will lead to an array overflow and thus often to a crash or other undefined behaviour.

Importing an arbitrary key can often easily be triggered by an attacker and thus triggering this bug. Exploiting the bug aside from crashes is not trivial but likely possible for a dedicated attacker.
The major hurdle for an attacker is that only every second byte is under their control with every first byte having a fixed value of 0x04.

ID	Name	Product	Family	Type	Severity
348858	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: gnupg2 (UTSA-2026-090091)	Nessus	Unity Linux Local Security Checks	Local	high
423979	Alpine: multiple gnupg packages: security update to 2.2.23-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
423979	Alpine: multiple gnupg packages: security update to 2.2.23-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
400341	Alpine: multiple gnupg packages: security update to 2.2.21-r1 (deprecated)	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
400341	Alpine: multiple gnupg packages: security update to 2.2.21-r1 (deprecated)	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
163206	EulerOS Virtualization 2.10.0 : gnupg2 (EulerOS-SA-2022-2024)	Nessus	Huawei Local Security Checks	Local	high
163194	EulerOS Virtualization 2.10.1 : gnupg2 (EulerOS-SA-2022-2052)	Nessus	Huawei Local Security Checks	Local	high
160046	EulerOS 2.0 SP10 : gnupg2 (EulerOS-SA-2022-1486)	Nessus	Huawei Local Security Checks	Local	high
159918	EulerOS 2.0 SP10 : gnupg2 (EulerOS-SA-2022-1505)	Nessus	Huawei Local Security Checks	Local	high
140238	FreeBSD : gnupg -- AEAD key import overflow (f9fa7adc-ee51-11ea-a240-002590acae31)	Nessus	FreeBSD Local Security Checks	Local	high

Detections

Analytics

CVE-2020-25125

high

Tenable Plugins

high

high

high

high

high

high

high

high

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high