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[USN-8319-1] Libgcrypt vulnerabilities

Posted on 27 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8319-1
May 27, 2026

libgcrypt20 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in Libgcrypt.

Software Description:
- libgcrypt20: LGPL Crypto library

Details:

It was discovered that Libgcrypt incorrectly handled crafted ECDH
ciphertext. An attacker could possibly use this issue to cause Libgcrypt to
crash, resulting in a denial of service. (CVE-2026-41989)

It was discovered that Libgcrypt incorrectly handled Dilithium signing. An
attacker could possibly use this issue to cause Libgcrypt to crash,
resulting in a denial of service. This issue only affected Ubuntu 26.04
LTS. (CVE-2026-41990)

Update instructions:

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

Ubuntu 26.04 LTS
libgcrypt20 1.12.0-2ubuntu0.1

Ubuntu 25.10
libgcrypt20 1.11.0-7ubuntu0.1

Ubuntu 24.04 LTS
libgcrypt20 1.10.3-2ubuntu0.1

Ubuntu 22.04 LTS
libgcrypt20 1.9.4-3ubuntu3.2

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

References:
https://ubuntu.com/security/notices/USN-8319-1
CVE-2026-41989, CVE-2026-41990

Package Information:
https://launchpad.net/ubuntu/+source/libgcrypt20/1.12.0-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.11.0-7ubuntu0.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.10.3-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.9.4-3ubuntu3.2

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