CVE-2026-10028 Denial of service in Red Hat Enterprise Linux 10
A remote attacker can cause a denial of service via infinite loop in glib-networking when using the GnuTLS backend with circular certificate chains.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-10028?
CVE-2026-10028 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 28 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A flaw was found in glib-networking. A remote attacker can exploit this vulnerability by presenting a specially crafted certificate chain to an application that uses glib-networking with the GnuTLS backend enabled and performs certificate verification. This crafted chain, which contains circular issuer relationships, can cause an infinite loop during certificate verification. The unbounded traversal consumes excessive CPU resources, leading to a denial of service for the affected process or worker.
Weakness: CWE-835
Which versions are affected by CVE-2026-10028?
Linux distribution packages (12)
glib-networking SUSE:Linux Enterprise Micro 5.3 | All versions | 2.70.1-150400.3.3.1 |
glib-networking SUSE:Linux Enterprise Micro 5.4 | All versions | 2.70.1-150400.3.3.1 |
glib-networking SUSE:Linux Enterprise Micro 5.5 | All versions | 2.70.1-150400.3.3.1 |
glib-networking SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 2.78.0-150600.3.3.1 |
glib-networking SUSE:Linux Enterprise Server 16.0 | All versions | 2.80.1-160000.3.1 |
glib-networking SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 2.48.2-6.6.1 |
glib-networking SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 2.80.1-160000.3.1 |
glib-networking SUSE:Linux Micro 6.0 | All versions | 2.76.0-4.1 |
glib-networking SUSE:Linux Micro 6.1 | All versions | 2.78.0-slfo.1.1_2.1 |
glib-networking SUSE:Linux Micro 6.2 | All versions | 2.80.1-160000.3.1 |
glib-networking openSUSE:Leap 16.0 | All versions | 2.80.1-160000.3.1 |
glib-networking openSUSE:Tumbleweed | All versions | 2.80.1-3.1 |
How do I fix CVE-2026-10028?
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-2026-10028 being exploited?
There is no known exploitation of CVE-2026-10028 in the wild and no public exploit code.
Sources
Also known as AZL-89301, DEBIAN-CVE-2026-10028, ECHO-f55e-6dd0-d4b5, GHSA-qvjg-2vfm-53c7, OESA-2026-2561, SUSE-SU-2026:22102-1 and 9 more.