CVE-2026-50045

CVE-2026-50045 affects NLnet Labs Unbound, versions 1.22.0 through 1.25.1. A single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to exceed the configured ‘max-global-quota’, effectively bypassing the upstream-traffic amplification limiter. The vulnerability...

OESA-2026-2965 dnsmasq security update

Dnsmasq provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. It is designed to be lightweight and have a small footprint, suitable for resource constrained routers and firewalls. It has also been widely used for tethering on smartphones and portabl...

dnsmasq: NSEC bitmap parsing infinite loop

A denial of service vulnerability was discovered in dnsmasq's DNSSEC validation. When parsing NSEC and NSEC3 bitmap records, the window iteration logic fails to account for the 2-byte window header when advancing through the bitmap data. A specially crafted DNS response with a zero-length bitmap...

EulerOS 2.0 SP15 : bind (EulerOS-SA-2026-2434)

According to the versions of the bind packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU...

Important: unbound security update

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options CVE-2026-42944 unbound: Unbound DNSSEC Validator Denial of Service via Incorrect Write Offset Counter in...

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...

unbound: Unbound DNSSEC Validator NSEC3 Hash Calculation Limit Bypass via Negative Cache Code Path Leading to DoS

A flaw was found in Unbound's DNSSEC validator where the code path for consulting the negative cache for DS records does not honor the limit on NSEC3 hash calculations introduced in version 1.19.1. An adversary who controls a DNSSEC-signed zone can sign NSEC3 records with high iteration counts fo...

unbound: Unbound DNSSEC Validator Denial of Service via Incorrect Write Offset Counter in Chase-Reply Messages

A flaw was found in Unbound's DNSSEC validator when constructing chase-reply messages for validation. The code uses the wrong counter to calculate write offsets for ADDITIONAL section resource record sets. When a DNAME chain is combined with authority filtering, an uninitialized array slot is...

CVE-2026-42923

NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the DNSSEC validator where the code path to consult the negative cache for DS records does not take into account the limit on NSEC3 hash calculations introduced in 1.19.1. This leads to degradation of service during the...

UBUNTU-CVE-2026-42959

NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for validation, the code uses the wrong counter to calculate write offsets fo...

SUSE CVE-2026-4891

A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet...

CVE-2026-4891

A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet...

CVE-2026-4891

A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet...

CVE-2026-4890 CVE-2026-4890

A Denial of Service DoS vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet...

PT-2026-39698

Name of the Vulnerable Software and Affected Versions dnsmasq affected versions not specified Description A Denial of Service DoS issue in the DNSSEC validation of dnsmasq allows remote attackers to cause a service disruption by sending a crafted DNS packet. Recommendations At the moment, there i...

openSUSE 16 Security Update : bind (openSUSE-SU-2026:20550-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20550-1 advisory. - Update to release 9.20.21 - CVE-2026-1519: maliciously crafted DNSSEC-validated zone can lead to denial of service bsc1260805. - CVE-2026-3104...

Oracle Linux 9 : bind (ELSA-2026-8075)

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-8075 advisory. - Prevent Denial of Service via maliciously crafted DNSSEC-validated zone CVE-2026-1519 - Prevent cache poisoning due to weak PRNG CVE-2025-40780 Tenable has...

bind9.18 security update

32:9.18.29-5.4 - Correct backport issue in the patch CVE-2026-1519 32:9.18.29-5.3 - Prevent Denial of Service via maliciously crafted DNSSEC-validated zone CVE-2026-1519...

CVE-2026-27602

Modoboa is a mail hosting and management platform. Prior to version 2.7.1, execcmd in modoboa/lib/sysutils.py always runs subprocess calls with shell=True. Since domain names flow directly into shell command strings without any sanitization, a Reseller or SuperAdmin can include shell metacharacte...

CVE-2026-0229

A denial-of-service DoS vulnerability in the Advanced DNS Security ADNS feature of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance...