CVE-2026-44608

medium Red Hat
CVSS v3 Base Score
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.1%
Exploitation probability in 30 days
Top 83% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: May 20, 2026 (50 days ago)
Last Modified: May 20, 2026
Vendor: Red Hat
Fix Available: ✓ Yes
Source: REDHAT

Description

A flaw was found in Unbound. When operating in a multi-threaded configuration with specific Response Policy Zones (RPZ) using 'rpz-nsip' or 'rpz-nsdname' triggers, a locking inconsistency during an RPZ zone transfer (XFR) reload can occur. This timing issue may allow an adversary to trigger a heap use-after-free vulnerability, leading to a system crash and a Denial of Service (DoS).

CWE

CWE-367

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9Red Hat OpenShift Container Platform 4Red Hat Hardened Images

Fix Status

✅ Fix Available

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 www.nlnetlabs.nl