Skip to content
USN-8720-1: GnuPG vulnerability

USN-8720-1: GnuPG vulnerability

Ubuntu September 3, 2026

It was discovered that GnuPG incorrectly validated authentication tag lengths when parsing CMS messages encrypted with AES-GCM. An attacker could possibly use this issue to bypass message integrity checks.

It was discovered that GnuPG incorrectly validated authentication tag lengths when parsing CMS messages encrypted with AES-GCM. An attacker could possibly use this issue to bypass message integrity checks.

It was discovered that GnuPG incorrectly validated authentication tag lengths when parsing CMS messages encrypted with AES-GCM. An attacker could possibly use this issue to bypass message integrity checks.

It was discovered that GnuPG incorrectly validated authentication tag lengths when parsing CMS messages encrypted with AES-GCM. An attacker could possibly use this issue to bypass message integrity checks.

In general, a standard system update will make all the necessary changes.

The problem can be corrected by updating your system to the following package versions:

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Extracted Entities

Companies (1)