CVE-2026-49868 RIOT: DHCPv6 client _parse_reply() missing sub-option length check leads to size_t underflow and unbounded OOB heap read

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, parsereply in sys/net/applicationlayer/dhcpv6/client.c omits minimum-length validation before passing IAPD and IANA option bodies to sub-option parsers. A...

CVE-2026-49868 RIOT: DHCPv6 client _parse_reply() missing sub-option length check leads to size_t underflow and unbounded OOB heap read

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.07, parsereply in sys/net/applicationlayer/dhcpv6/client.c omits minimum-length validation before passing IAPD and IANA option bodies to sub-option parsers. A...

CVE-2026-49868

The RIOT open-source microcontroller operating system is vulnerable to an unbounded out-of-bounds (OOB) heap read due to a missing minimum-length validation in the _parse_reply() function within sys/net/application_layer/dhcpv6/client.c. If MODULE_DHCPV6_CLIENT_IA_PD is enabled, a malicious or co...

PT-2026-115663

Name of the Vulnerable Software and Affected Versions RIOT versions prior to 2026.07 Description In the DHCPv6 client, the parse reply function in sys/net/application layer/dhcpv6/client.c fails to perform minimum-length validation before passing IA PD and IA NA option bodies to sub-option parser...

Astra Linux – Vulnerability in busybox

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

Cisco ASA Heap-based Buffer Overflow (CVE-2023-20081)

A vulnerability in the IPv6 DHCP DHCPv6 client module of Cisco Adaptive Security Appliance ASA Software, Cisco Firepower Threat Defense FTD Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an...

ANT-2026-PCBAKVPB · dnsmasq · Heap-buffer-overflow

heap-buffer-overflow high CVE-2026-4892 GHSA-m62j-63mf-xr95 Severity Claude high · Security research firm high · Maintainer high Discovered by an unreleased Anthropic model REPORT Anthropic's analysis, sealed at approval. Disclosure to the maintainer was performed by Trail of Bits...

EulerOS 2.0 SP13 : busybox (EulerOS-SA-2026-2958)

According to the versions of the busybox package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in...

EulerOS 2.0 SP15 : busybox (EulerOS-SA-2026-2876)

According to the versions of the busybox package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : BusyBox before commit 42202bf contains a heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in...

SUSE SLES15: libopenvswitch-3_1-0 / libovn-23_03-0 / openvswitch / etc (SUSE-SU-2026:2475-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2475-1 advisory. This update for openvswitch fixes the following issues - CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498...

Security update for openvswitch

This update for openvswitch fixes the following issues Update ovn to 25.03.3: CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498. CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing bsc1262499. Patch Instructions: To install this SUSE update use the SUSE...

Security update for busybox (important)

openSUSE security update: security update for busybox ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:20883-1 Rating: important References: bsc1263989 Cross-References: CVE-2026-29004 CVSS scores: CVE-2026-29004 SUSE : 8.1...

Security update for busybox

This update for busybox fixes the following issue CVE-2026-29004: a crafted DHCPv6 response can lead to a heap buffer overflow in the DHCPv6 client bsc1263989. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST onlineupdate or "zypper patch"...

SUSE SLES15 Security Update : busybox (SUSE-SU-2026:2053-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:2053-1 advisory. This update for busybox fixes the following issue - CVE-2026-29004: Heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVE...

SUSE SLED15 / SLES15 Security Update : busybox (SUSE-SU-2026:2054-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:2054-1 advisory. This update for busybox fixes the following issue - CVE-2026-29004: Heap buffer overflow vulnerability in the DHCPv6...

SUSE-SU-2026:2054-1 Security update for busybox

This update for busybox fixes the following issue - CVE-2026-29004: Heap buffer overflow vulnerability in the DHCPv6 client udhcpc6 DNSSERVERS option handler in networking/udhcp/d6dhcpc.c bsc1263989...

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-2026-29004 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...

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...