Denial of Service Vulnerability in Red Hat Enterprise Linux VNC TLS by Gnome Remote Desktop
CVE-2026-109832

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
13 October 2026

What is CVE-2026-109832?

A vulnerability exists in Gnome Remote Desktop as part of Red Hat Enterprise Linux due to improper handling of retryable GnuTLS results in the VNC TLS I/O handlers. This flaw leads to an unbounded busy loop when certain conditions occur, allowing an unauthenticated remote attacker with access to a VNC TLS listener to engage the event-loop thread in a high CPU spinning state. The issue results in significant performance degradation and denial of service, ultimately preventing legitimate users from establishing VNC connections.

References

https://access.redhat.com/security/cve/CVE-2026-109832
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2550352
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Aisle Research for reporting this issue.
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