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ALSA-2026:18556 — Moderate: unbound security update

Affected: AlmaLinux:10: python3-unbound, AlmaLinux:10: unbound, AlmaLinux:10: unbound-anchor, AlmaLinux:10: unbound-devel, AlmaLinux:10: unbound-dracut, AlmaLinux:10: unbound-libs, AlmaLinux:10: unbound-utils

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

Security Fix(es):

* unbound: DNSBomb vulnerability (CVE-2024-33655) * unbound: Unbound domain hijacking via promiscuous records (CVE-2025-11411)

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.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

bdu:2024-04004

EUVD-2026-260137

fkie_cve-2024-33655

The DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by arranging for DNS queries to be accumulated for seconds, such that responses are later sent in a pulsing burst (which can be considered traffic amplification in some cases), aka the "DNSBomb" issue.

GHSA-2xh4-pf7v-vh6h

gsd-2024-33655

msrc_CVE-2024-33655 — The DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by…

msrc_CVE-2024-33655

OESA-2024-2231 — unbound security update

Affected: openEuler:22.03-LTS-SP4: unbound

Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards. To help increase online privacy, Unbound supports DNS-over-TLS which allows clients to encrypt their communication. Unbound is available for most platforms such as FreeBSD, OpenBSD, NetBSD, MacOS, Linux and Microsoft Windows. Unbound is a totally free, open source software under the BSD license. It doesn't make custom builds or provide specific features to paying customers only. Security Fix(es): The DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by arranging for DNS queries to be accumulated for seconds, such that responses are later sent in a pulsing burst (which can be considered traffic amplification in some cases), aka the "DNSBomb" issue.(CVE-2024-33655)

openSUSE-SU-2024:13944-1 — libunbound8-1.20.0-1.1 on GA media

libunbound8-1.20.0-1.1 on GA media

SUSE-SU-2025:20024-1 — Security update for unbound

Security update for unbound

UBUNTU-CVE-2024-33655

Affected: Ubuntu:Pro:14.04:LTS: unbound, Ubuntu:Pro:16.04:LTS: unbound, Ubuntu:Pro:18.04:LTS: unbound, Ubuntu:20.04:LTS: unbound, Ubuntu:22.04:LTS: unbound, Ubuntu:24.04:LTS: unbound