OPENSUSE-SU-2026:20748-1 Security update for dnsmasq

This update for dnsmasq fixes the following issues Security issues: - CVE-2026-2291: dnsmasq can be abused to record false cached data enabling DoS or attacker redirect bsc1258251. - CVE-2026-4890: DoS vulnerability in the DNSSEC validation bsc1265001. - CVE-2026-4891: heap-based out-of-bounds re...

USN-8268-1: Dnsmasq vulnerabilities

Andrew S. Fasano, Royce M, and Hugo Martinez Ray discovered that Dnsmasq did not allocate the necessary space to store domain names in some contexts. An attacker could possibly use this issue to write out-of-bounds, and could cause a denial of service or execute arbitrary code. CVE-2026-2291 Royc...

CVE-2026-4892

A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet...

CVE-2026-4892

CVE-2026-4892 describes a heap-based out-of-bounds write in the DHCPv6 code path of dnsmasq. The vulnerability allows a local attacker to execute arbitrary code with root privileges by crafting a DHCPv6 packet. The issue is tied to dnsmasq’s DHCPv6 implementation and has an overall CVSS 3.1 base ...

Linux Distros Unpatched Vulnerability : CVE-2026-4892

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via...

dnsmasq contains several vulnerabilities, including attacker DNS redirect, privilege escalation, and heap manipulation

Overview dnsmasq is affected by multiple memory safety and input validation vulnerabilities, including heap buffer overflows, heap corruption, and code execution flaws. Collectively, these vulnerabilities enable attackers to poison cached DNS records, bypass security controls, crash the dnsmasq...

PT-2026-39700

Name of the Vulnerable Software and Affected Versions dnsmasq affected versions not specified Description A heap-based out-of-bounds write in the DHCPv6 implementation allows local attackers to execute arbitrary code with root privileges by sending a crafted DHCPv6 packet. A heap-based...

Linux Distros Unpatched Vulnerability : CVE-2026-29004

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in networking/udhcp/d6dhcpc.c...

CVE-2026-29004

BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in networking/udhcp/d6dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6OPTDNSSERVER...

CVE-2026-29004 BusyBox DHCPv6 Client Heap Buffer Overflow via DNS_SERVERS

BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in networking/udhcp/d6dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6OPTDNSSERVER...

CVE-2026-29004

BusyBox prior to commit 42202bf contains a heap buffer overflow in the DHCPv6 client (udhcpc6) DNS_SERVERS option handler (networking/udhcp/d6_dhcpc.c). Attackers on the network-adjacent path can trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6_OPT_DNS_SERVERS op...

CVE-2026-29004 BusyBox DHCPv6 Client Heap Buffer Overflow via DNS_SERVERS

BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in networking/udhcp/d6dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6OPTDNSSERVER...

CVE-2026-29004 BusyBox DHCPv6 Client Heap Buffer Overflow via DNS_SERVERS

BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in networking/udhcp/d6dhcpc.c that allows network-adjacent attackers to trigger memory corruption by sending a crafted DHCPv6 response with a malformed D6OPTDNSSERVER...

BusyBox 安全漏洞

BusyBox is a set of applications developed by Denis Vlasenko from Ukraine. It contains multiple Linux commands and tools. There is a security vulnerability in BusyBox, which stems from a heap buffer overflow in the DNSSERVERS option handler of the DHCPv6 client udhcpc6. This vulnerability allows...

PT-2026-36890

Name of the Vulnerable Software and Affected Versions BusyBox versions prior to commit 42202bf Description A heap buffer overflow exists in the DHCPv6 client udhcpc6 DNS SERVERS option handler within the networking/udhcp/d6 dhcpc.c file. Network-adjacent attackers can trigger memory corruption by...

RHEL 9 : ovn23.06 (RHSA-2026:11696)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:11696 advisory. OVN, the Open Virtual Network, is a system to support virtual network abstraction. OVN complements the existing capabilities of OVS to add...

RHEL 8 : ovn-2021 (RHSA-2026:11694)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:11694 advisory. OVN, the Open Virtual Network, is a system to support virtual network abstraction. OVN complements the existing capabilities of OVS to add...

RHEL 9 : ovn25.09 (RHSA-2026:11702)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:11702 advisory. OVN, the Open Virtual Network, is a system to support virtual network abstraction. OVN complements the existing capabilities of OVS to add...

CVE-2026-7424

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service permanent IP task freeze requiring hardware reset ...

CVE-2026-7424 Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Plus-TCP

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service permanent IP task freeze requiring hardware reset ...