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OpenAdvisories
Medium RHSA-2026:68292 1 CVE

Red Hat Security Advisory: unbound security update

Published Sep 17, 2026 · Updated Oct 19, 2026

Ecosystem: Red Hat

Fixed packages 13

ReleasePackageFixed in
Red Hat · RHEL 9 enterprise_linux:9::appstream python3-unbound 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::appstream python3-unbound-debuginfo 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::appstream unbound 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::appstream unbound-debuginfo 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::appstream unbound-debugsource 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::appstream unbound-dracut 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::appstream unbound-libs 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::appstream unbound-libs-debuginfo 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::crb python3-unbound-debuginfo 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::crb unbound-debuginfo 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::crb unbound-debugsource 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::crb unbound-devel 0:1.24.2-3.el9_8.6
Red Hat · RHEL 9 enterprise_linux:9::crb unbound-libs-debuginfo 0:1.24.2-3.el9_8.6

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

References

  • article
    https://access.redhat.com/security/updates/classification/#moderate
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2506133
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_68292.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-50252
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-50252
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-50252
  • article
    https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-50252.txt