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[USN-8017-1] GLib vulnerabilities

Posted on 05 February 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8017-1
February 05, 2026

glib2.0 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in GLib.

Software Description:
- glib2.0: GLib library of C routines

Details:

It was discovered that GLib incorrectly parsed large Base64 data. An
attacker could use this issue to cause GLib to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2026-1484)

It was discovered that GLib incorrectly parsed certain treemagic files.
An attacker could use this issue to cause GLib to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2026-1485)

It was discovered that GLib incorrectly handled Unicode case conversion.
An attacker could use this issue to cause GLib to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2026-1489)

Update instructions:

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

Ubuntu 25.10
libglib2.0-0t64 2.86.0-2ubuntu0.3
libglib2.0-bin 2.86.0-2ubuntu0.3

Ubuntu 24.04 LTS
libglib2.0-0t64 2.80.0-6ubuntu3.8
libglib2.0-bin 2.80.0-6ubuntu3.8

Ubuntu 22.04 LTS
libglib2.0-0 2.72.4-0ubuntu2.9
libglib2.0-bin 2.72.4-0ubuntu2.9

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

References:
https://ubuntu.com/security/notices/USN-8017-1
CVE-2026-1484, CVE-2026-1485, CVE-2026-1489

Package Information:
https://launchpad.net/ubuntu/+source/glib2.0/2.86.0-2ubuntu0.3
https://launchpad.net/ubuntu/+source/glib2.0/2.80.0-6ubuntu3.8
https://launchpad.net/ubuntu/+source/glib2.0/2.72.4-0ubuntu2.9

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