Skip to content
OpenAdvisories
Medium ELSA-2026-69120 1 CVE

Moderate: unbound security update (Oracle Linux 8)

Published Sep 23, 2026 · Updated Sep 23, 2026

Ecosystem: Oracle Linux

Summary

[1.16.2-5.14.2]
- Backport additional fix from 1.26.0 (CVE-2026-50252)
- Correct new warning in previous change (CVE-2026-44690)

[1.16.2-5.14.1]
- Fix CVE-2026-50252 (cache poisoning via source port prediction)

Fixed packages 4

ReleasePackageFixed in
Oracle Linux · 8 python3-unbound 0:1.16.2-5.14.el8_10.2
Oracle Linux · 8 unbound 0:1.16.2-5.14.el8_10.2
Oracle Linux · 8 unbound-devel 0:1.16.2-5.14.el8_10.2
Oracle Linux · 8 unbound-libs 0:1.16.2-5.14.el8_10.2

Vulnerabilities 1

  • Medium 5.7
    CVE-2026-50252

    Possible cache poisoning attack by mapping source port population per thread

    In NLnet Labs Unbound 1.4.22 up to and including 1.25.1, UDP source port is randomized and intended to serve as a secret value that increases the entropy of DNS transactions. When resolver load balancing policies depend on the source port while their outcome …

    NLnet Labs Unbound unbound unbound Debian Ubuntu Azure Linux Alpine