Astra Linux – Vulnerability in unbound

NLnet Labs Unbound, including version 1.16.1, is vulnerable to a new type of “ghost domain names” attack. The vulnerability operates by targeting an Unbound instance. When the cached delegation information is about to expire, Unbound queries for a rogue domain name. The rogue nameserver delays th...

Astra Linux – Vulnerabilities in unbound, bind9, and dnsmasq

Certain aspects of the DNS protocol’s DNSSEC mechanism described in RFC 4033, 4034, 4035, 6840, and related RFCs allow remote attackers to cause a denial of service attack by manipulating one or more DNSSEC responses. This issue is known as the “KeyTrap” problem. One of the concerns is that, when...

Astra Linux – Vulnerability in unbound

NLnet Labs Unbound, including version 1.16.1, is vulnerable to a new type of “ghost domain name” attack. The vulnerability operates by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain,...

Astra Linux – Vulnerability in unbound

Before version 1.9.5, Unbound allowed an out-of-bounds write operation through a compressed name in rdatacopy. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, an ongoing Unbound installation cannot be remotely or locally exploited...

Astra Linux – Vulnerability in unbound

Before version 1.9.5, Unbound allowed for an integer overflow in the size calculation in respip/respip.c. NOTE: The vendor denies that this is a vulnerability. Although the code may be vulnerable, an active Unbound installation cannot be exploited remotely or locally...

Astra Linux – Vulnerability in unbound

Unbound versions up to and including 1.21.0 contain a vulnerability when handling replies with very large RRsets that it needs to perform name compression on. Malicious upstream responses with very large RRsets can cause Unbound to spend considerable time applying name compression to downstream...

Astra Linux – Vulnerability in unbound

Unbound from NLnet Labs, including versions up to and including 1.12.0, and NSD from NLnet Labs, including versions up to and including 4.3.3, contain a local vulnerability that allows for a local symlink attack. When creating the PID file, Unbound and NSD either create the file if it does not...

Astra Linux – Vulnerability in unbound

Before version 1.9.5, Unbound allowed an integer overflow in the regional allocator through the ALIGNUP macro. NOTE: The vendor denies that this is a vulnerability. Although the code may be vulnerable, an ongoing Unbound installation cannot be remotely or locally exploited...

Astra Linux – Vulnerability in unbound

Unbound before version 1.9.5 allows assertion failures and denial of service in dnamepktcopy due to an invalid packet. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, an ongoing Unbound installation cannot be remotely or locally exploited...

CVE-2026-50045

A vulnerability in Unbound allows a remote attacker to bypass upstream amplification limits by querying a deeply nested name under a DNSSEC-signed parent. This triggers excessive outbound traffic per query, potentially causing a denial of service DoS. Mitigation Restrict recursive DNS access...

EulerOS 2.0 SP11 : unbound (EulerOS-SA-2026-3161)

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 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and...

F5 Networks BIG-IP : NLnet Labs Unbound vulnerability (K000162784)

The version of F5 Networks BIG-IP installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the K000162784 advisory. NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the jostle logic that could defeat its...

EulerOS 2.0 SP13 : unbound (EulerOS-SA-2026-3054)

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 1.25.0 has a vulnerability when handling replies with very large RRsets that Unbound needs to...

EulerOS 2.0 SP13 : unbound (EulerOS-SA-2026-3004)

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 1.25.0 has a vulnerability when handling replies with very large RRsets that Unbound needs to...

EulerOS 2.0 SP15 : unbound (EulerOS-SA-2026-2913)

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 1.14.0 up to and including version 1.25.0 has a locking inconsistency vulnerability that when certain conditions are met...

TencentOS Server 4: unbound (TSSA-2026:0786)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0786 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:...

Important: unbound

Issue Overview: In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, insufficient validation of the RRSIG.Labels field combined with premature cache writes during RFC 8198 aggressive NSEC processing leads to cache poisoning that permits a malicious actor controlling a single delegated zone to...

RockyLinux 8 : unbound (RLSA-2023:2771)

The remote RockyLinux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2023:2771 advisory. unbound: NRDelegation attack leads to uncontrolled resource consumption Non-Responsive Delegation Attack CVE-2022-3204 Tenable has extracted the preceding...

Amazon Linux 2 : unbound, --advisory ALAS2UNBOUND-1.17-2026-009 (ALASUNBOUND-1.17-2026-009)

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-1.17-2026-009 advisory. In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, insufficient validation of the RRSIG.Labels field...

AlmaLinux 8 : unbound (ALSA-2026:37282)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:37282 advisory. unbound: Unbound: Denial of Service via excessive EDNS options CVE-2026-41292 unbound: Unbound: Cache manipulation via 'ghost domain names' attack...