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OpenAdvisories
Medium ALSA-2025:8047 1 CVE

Moderate: unbound security update

Published May 20, 2025 · Updated Oct 29, 2026

Summary

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.

Security Fix(es):

* unbound: Unbounded name compression could lead to Denial of Service (CVE-2024-8508)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 6

ReleasePackageFixed in
AlmaLinux · 10 python3-unbound 1.20.0-10.el10_0
AlmaLinux · 10 unbound 1.20.0-10.el10_0
AlmaLinux · 10 unbound-anchor 1.20.0-10.el10_0
AlmaLinux · 10 unbound-devel 1.20.0-10.el10_0
AlmaLinux · 10 unbound-dracut 1.20.0-10.el10_0
AlmaLinux · 10 unbound-libs 1.20.0-10.el10_0

Vulnerabilities 1

  • Medium 5.3

    Unbounded name compression could lead to Denial of Service

    NLnet Labs Unbound up to and including version 1.21.0 contains a vulnerability when handling replies with very large RRsets that it needs to perform name compression for. Malicious upstreams responses with very large RRsets can cause Unbound to spend a consid…

References

  • report
    https://access.redhat.com/security/cve/CVE-2024-8508
  • report
    https://bugzilla.redhat.com/2316321
  • advisory
    https://errata.almalinux.org/10/ALSA-2025-8047.html