CVE-2026-10028
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.
Statement
There's a vulnerability in the glib-networking package, where a server with a maliciously crafted certificate chain can lead the application using the glib-networking libraries with GnuTLS backend to an excessive CPU consumption and cause a Denial-of-Service as consequence of it. The vulnerability happens when the application is performing a certificate validation and the crafted certificate chain contains a circular issuer relationship. For latest glib-networking versions such as shipped with Red Hat Enterprise Linux 10, this can lead the client application to freeze when connecting to a malicious server holding the crafted certificate chain resulting in an availability impact to the specific execution on the process (A:L). For versions of glib-networking as shipped with Red Hat Enterprise Linux 9 and older, it's possible that an attacker may be able to cause a Denial-of-Service in a server application which does the same kind of validation depending on certain scenarios.
Red Hat Product Security team has rated this vulnerability as having a Low impact since, in general, the result of a exploitation needs the user to be tricked to connect to a malicious server and would have a low availability impact as consequence.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.3 | N/A | 4.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Amplification
An infinite loop will cause unexpected consumption of resources, such as CPU cycles or memory. The software's operation may slow down, or cause a long time to respond.
Acknowledgements
Red Hat would like to thank AISLE Research for reporting this issue.
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