CVE-2026-42955

In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other...

unbound: Unbound: DNS cache integrity issue

A "ghost domain names" flaw in Unbound allows a remote attacker controlling a domain to manipulate cached DNS records. By extending the lifetime of outdated DNS information, an attacker can cause clients to receive stale or misleading DNS responses...

EUVD-2026-47666

In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other...

CVE-2026-42955

NLnet Labs Unbound versions 1.16.2–1.25.1 are affected by CVE-2026-42955, a variant of CVE-2026-40622. An adversary controlling a ghost zone and able to query Unbound can cause the cache to overwrite expired parent-side glue A/AAAA records, extending the ghost domain window by up to one cached TT...

CVE-2026-42955 Extra fix for CVE-2026-40622 to also clamp the TTL of A/AAAA records disallowing a one-time 'ghost domain' delegation renewal via glue records

In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other...

CVE-2026-42955

In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other...

CVE-2026-42955 Extra fix for CVE-2026-40622 to also clamp the TTL of A/AAAA records disallowing a one-time 'ghost domain' delegation renewal via glue records

In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other...

CVE-2026-42955

In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other...

SUSE-SU-2026:22932-1 Security update for avahi

This update for avahi fixes the following issues: - CVE-2025-59529: local DoS due to simple protocol server ignoring client limit CLIENTSMAX bsc1255451. Changes for avahi: - Make /var/lib/avahi-autoipd a ghost dir instead of packaging it since avahi-autoipd creates it on start jscPED-14836. - Use...

SUSE-SU-2026:22853-1 Security update for avahi

This update for avahi fixes the following issues: - CVE-2025-59529: local DoS due to simple protocol server ignoring client limit CLIENTSMAX bsc1255451. Changes for avahi: - Make /var/lib/avahi-autoipd a ghost dir instead of packaging it since avahi-autoipd creates it on start jscPED-14836. - Use...

OPENSUSE-SU-2026:21417-1 Security update for avahi

This update for avahi fixes the following issues: - CVE-2025-59529: local DoS due to simple protocol server ignoring client limit CLIENTSMAX bsc1255451. Changes for avahi: - Make /var/lib/avahi-autoipd a ghost dir instead of packaging it since avahi-autoipd creates it on start jscPED-14836. - Use...

PT-2026-63373

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.16.2 through 1.25.1 Description An issue exists within the ghost domain names family of attacks where an adversary controlling a ghost zone can extend the ghost domain window for A/AAAA glue records. By sending a...

CVE-2026-42955: Operation on a Resource after Expiration or Release

In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other...

Oracle Linux 10 : unbound (ELSA-2026-23231)

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-23231 advisory. - Fix CVE-2026-42534: Jostle logic bypass degrades resolution performance - Fix CVE-2026-41292: DoS via excessive EDNS options - Add upstream unit te...

unbound -- multiple vulnerabilities

NLnet Labs reports: This release consolidates security fixes for issues reported over a period of time. There are fixes for: CVE-2026-14586: Assertion in libngtcp2 when under pressure in high concurrency DNS-over-QUIC environments. CVE-2026-32665: Remote DNS-over-QUIC denial of service due to...

EulerOS Virtualization 2.12.0 : unbound (EulerOS-SA-2026-2809)

According to the versions of the unbound packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section...

EulerOS Virtualization 2.12.1 (EulerOS-SA-2026-2763)

According to the versions of the packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section...

unbound security update

1.24.2-15 - Fix CVE-2026-42534: Jostle logic bypass degrades resolution performance 1.24.2-14 - Fix CVE-2026-41292: DoS via excessive EDNS options 1.24.2-13 - Add upstream unit test for CVE-2026-40622 1.24.2-12 - Fix CVE-2026-44390: DoS with large RRsets 1.24.2-11 - Fix CVE-2026-40622: cache...

Amazon Linux 2 : unbound, --advisory ALAS2UNBOUND-1.17-2026-008 (ALASUNBOUND-1.17-2026-008)

The version of unbound installed on the remote host is prior to 1.17.0-2. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2UNBOUND-1.17-2026-008 advisory. NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that...

Important: unbound

Issue Overview: NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and erroneously overwriting a destination pointer. An adversary c...