CVE-2026-77860

In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the 'serve-expired' code path can cause a double decrement on the 'wait-limit' counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb CVE-2024-33655. A malicious actor can...

CVE-2026-77860

NLnetLabs Unbound versions 1.20.0 through 1.26.0 are affected by a double-decrement flaw in the serve-expired code path that causes the per-client wait-limit counter to be decremented twice. An attacker controlling an authoritative zone with short TTLs can alternate "slow" queries (never answered...

CVE-2026-77860

In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the 'serve-expired' code path can cause a double decrement on the 'wait-limit' counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb CVE-2024-33655. A malicious actor can...

EUVD-2026-80286

In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the 'serve-expired' code path can cause a double decrement on the 'wait-limit' counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb CVE-2024-33655. A malicious actor can...

MiracleLinux 9 : unbound-1.24.2-2.el9 (AXSA:2026-1052:06)

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1052:06 advisory. unbound: DNSBomb vulnerability CVE-2024-33655 unbound: Unbound domain hijacking via promiscuous records CVE-2025-11411 Tenable has extracted the...

RockyLinux 10 : unbound (RLSA-2026:18556)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:18556 advisory. unbound: DNSBomb vulnerability CVE-2024-33655 unbound: Unbound domain hijacking via promiscuous records CVE-2025-11411 Tenable has extracted the...

unbound security update

An update is available for unbound. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The unbound packages provide a validating, recursive, and caching DNS or...

RLSA-2026:18556 Moderate: unbound security update

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: unbound: DNSBomb vulnerability CVE-2024-33655 unbound: Unbound domain hijacking via promiscuous records CVE-2025-11411 For more details about the security issues, including the impact, a CVSS...

unbound security update

An update is available for unbound. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The unbound packages provide a validating, recursive, and caching DNS or DNSS...

Moderate: Red Hat Security Advisory: unbound security update

An update for unbound is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from th...

unbound: DNSBomb vulnerability

A DNSBomb flaw was found in the unbound package. The DNSBomb attack works by sending low-rate spoofed queries for a malicious zone to Unbound. By controlling the delay of the malicious authoritative answers, Unbound slowly accumulates pending answers for the spoofed addresses. When the...

Moderate: unbound security update

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: unbound: DNSBomb vulnerability CVE-2024-33655 unbound: Unbound domain hijacking via promiscuous records CVE-2025-11411 For more details about the security issues, including the impact, a CVSS...

ALSA-2026:18931 Moderate: unbound security update

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: unbound: DNSBomb vulnerability CVE-2024-33655 unbound: Unbound domain hijacking via promiscuous records CVE-2025-11411 For more details about the security issues, including the impact, a CVSS...

ALSA-2026:18556 Moderate: unbound security update

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: unbound: DNSBomb vulnerability CVE-2024-33655 unbound: Unbound domain hijacking via promiscuous records CVE-2025-11411 For more details about the security issues, including the impact, a CVSS...

RHEL 9 : unbound (RHSA-2026:18931)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:18931 advisory. The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: unbound: DNSBomb vulnerability...

CVE-2023-49203

Technitium 11.5.3 allows remote attackers to cause a denial of service bandwidth amplification because the DNSBomb manipulation causes accumulation of low-rate DNS queries such that there is a large-sized response in a burst of traffic...

EulerOS Virtualization 2.12.0 : unbound (EulerOS-SA-2025-1575)

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 1.21.0 contains a vulnerability when handling replies with very large RRsets that i...

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

This update for unbound fixes the following issues: - Update to 1.20.0: Features: The config for discard-timeout, wait-limit, wait-limit-cookie, wait-limit-netblock and wait-limit-cookie-netblock was added, for the fix to the DNSBomb issue. Merge GH1027: Introduce 'cache-min-negative-ttl' option...

EulerOS 2.0 SP12 : unbound (EulerOS-SA-2024-2959)

According to the versions of the unbound packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : 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...

EulerOS 2.0 SP12 : unbound (EulerOS-SA-2024-2943)

According to the versions of the unbound packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : 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...