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[USN-7752-1] libyang vulnerabilities

Posted on 16 September 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7752-1
September 16, 2025

libyang2 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS

Summary:

libyang could be made to crash if it received specially crafted input.

Software Description:
- libyang2: parser toolkit for IETF YANG data modeling

Details:

It was discovered that libyang incorrectly handled certain memory
operations when parsing YANG strings. An attacker could possibly use this
issue to cause libyang to crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 24.04 LTS
libyang2t64 2.1.30-2.1ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-7752-1
CVE-2023-26916, CVE-2023-26917

Package Information:
https://launchpad.net/ubuntu/+source/libyang2/2.1.30-2.1ubuntu0.1

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