CVE-2023-32665 Gvariant deserialisation does not match spec for non-normal data
A crafted GVariant input causes excessive processing in GLib, leading to denial of service for applications using the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-32665?
CVE-2023-32665 is a medium-severity denial of service vulnerability in Fedora Extra Packages for Enterprise Linux, published on 14 Sep 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A flaw was found in GLib. GVariant deserialization is vulnerable to an exponential blowup issue where a crafted GVariant can cause excessive processing, leading to denial of service.
Which versions are affected by CVE-2023-32665?
It affects 1 product.
Products include Gnome Glib.
How do I fix CVE-2023-32665?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-32665 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-32665 exists.
Other vulnerabilities in Fedora Extra Packages for Enterprise Linux
- CVE-2020-35457 Integer overflow in n/a
- CVE-2009-3289 Privilege escalation in n/a
- CVE-2025-13601 Glib: integer overflow in in g_escape_uri_string()
- CVE-2026-58016 Glib: integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml"
- CVE-2025-4056 Glib: glib crash after long command line
Sources
Also known as AZL-28776, DEBIAN-CVE-2023-32665, GHSA-c9xj-rf55-c64g, JLSEC-2025-164, UBUNTU-CVE-2023-32665.