Denial of Service Vulnerability in dbus with nonce-tcp Transport
CVE-2026-128886

6.2MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Vendor
CVE Published:
13 November 2026

What is CVE-2026-128886?

A vulnerability exists in dbus when configured to utilize the nonce-tcp transport method. An unauthenticated attacker can exploit this flaw by establishing a connection with an exposed listener and intentionally withholding the required authentication token. This action leads to a Denial of Service (DoS), as the server fails to process the connection request within a set timeframe. Consequently, legitimate clients are unable to establish new connections due to the server being tied up in the stalled authentication verification process.

References

https://access.redhat.com/security/cve/CVE-2026-128886
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2472930
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
6.2
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.