CVE-2023-29499 Gvariant offset table entry size is not checked in is_normal()
Attackers can cause a denial of service in applications using GLib by providing malformed GVariant data that bypasses format validation.
- 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-2023-29499?
CVE-2023-29499 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 fails to validate that the input conforms to the expected format, leading to denial of service.
Weakness: CWE-400
Which versions are affected by CVE-2023-29499?
It affects 1 product.
Products include Gnome Glib.
How do I fix CVE-2023-29499?
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-2023-29499 being exploited?
There is no known exploitation of CVE-2023-29499 in the wild and no public exploit code.
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-28775, DEBIAN-CVE-2023-29499, GHSA-794g-pjcw-ggfp, JLSEC-2025-160, UBUNTU-CVE-2023-29499.