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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glib-networking | 2.90.0-1 | — |
| Debian 13 | glib-networking | No fix yet | — |
| Debian 12 | glib-networking | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | glib-networking | No fix yet | — |
| Ubuntu 26.04 LTS | glib-networking | No fix yet | — |
| Ubuntu 25.10 | glib-networking | No fix yet | — |
| Ubuntu 24.04 LTS | glib-networking | No fix yet | — |
| Ubuntu 22.04 LTS | glib-networking | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | glib-networking | No fix yet | — |
| Ubuntu 18.04 LTS | glib-networking | No fix yet | — |
| Ubuntu 16.04 LTS | glib-networking | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | glib-networking | 2.78.0-150600.3.3.1 | SUSE-SU-2026:3032-1 |
| SLES 12 SP5 | glib-networking | 2.48.2-6.6.1 | SUSE-SU-2026:3121-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | glib-networking | 2.80.1-160000.3.1 | SUSE-SU-2026:22297-1 |
| SLES 16.0 | glib-networking | 2.80.1-160000.3.1 | SUSE-SU-2026:22297-1 |
| SLE Micro 6.2 | glib-networking | 2.80.1-160000.3.1 | SUSE-SU-2026:22230-1 |
| SLE Micro 6.1 | glib-networking | 2.78.0-slfo.1.1_2.1 | SUSE-SU-2026:22135-1 |
| SLE Micro 6.0 | glib-networking | 2.76.0-4.1 | SUSE-SU-2026:22102-1 |
| SLE Micro 5.5 | glib-networking | 2.70.1-150400.3.3.1 | SUSE-SU-2026:2810-1 |
| SLE Micro 5.4 | glib-networking | 2.70.1-150400.3.3.1 | SUSE-SU-2026:2810-1 |
| SLE Micro 5.3 | glib-networking | 2.70.1-150400.3.3.1 | SUSE-SU-2026:2810-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glib-networking | 2.80.1-3.1 | openSUSE-SU-2026:11010-1 |
| openSUSE Leap 16.0 | glib-networking | 2.80.1-160000.3.1 | openSUSE-SU-2026:21130-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | glib-networking | 2.78.0-2 | — |
Advisories 9
- SUSE-SU-2026:3121-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jul 21, 2026
- SUSE-SU-2026:3032-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jul 16, 2026
- SUSE-SU-2026:2810-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jul 10, 2026
- SUSE-SU-2026:22297-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jul 2, 2026
- openSUSE-SU-2026:21130-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:22230-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jun 24, 2026
- SUSE-SU-2026:22135-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jun 18, 2026
- SUSE-SU-2026:22102-1 Security update for glib-networking SUSE / openSUSE Security Updates · Jun 17, 2026
- openSUSE-SU-2026:11010-1 glib-networking-2.80.1-3.1 on GA media SUSE / openSUSE Security Updates · Jun 13, 2026