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OpenAdvisories
High ELSA-2026-24365 2 CVEs

Important: unbound security update (Oracle Linux 8)

Published Jun 8, 2026 · Updated Jun 8, 2026

Ecosystem: Oracle Linux

Summary

[1.16.2-5.11]
- Fix CVE-2026-42944 (RHEL-177909)
- Fix CVE-2026-42959 (RHEL-177809)

Fixed packages 4

ReleasePackageFixed in
Oracle Linux · 8 python3-unbound 0:1.16.2-5.11.el8_10
Oracle Linux · 8 unbound 0:1.16.2-5.11.el8_10
Oracle Linux · 8 unbound-devel 0:1.16.2-5.11.el8_10
Oracle Linux · 8 unbound-libs 0:1.16.2-5.11.el8_10

Vulnerabilities 2

  • High 8.7
    CVE-2026-42944

    Heap overflow with multiple NSID, COOKIE, PADDING EDNS options

    NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in the reply packet. The relevant options ('nsid', 'answer-cookie', '…

    NLnet Labs Unbound unbound unbound Debian Ubuntu Azure Linux Alpine
  • High 8.7
    CVE-2026-42959

    Crash during DNSSEC validation of malicious content

    NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for validation, the code uses the wrong…

    NLnet Labs Unbound unbound unbound Debian Ubuntu Azure Linux Alpine