OESA-2026-2807 radvd security update

The router advertisement daemon radvd is run by Linux or BSD systems acting as IPv6 routers. It sends Router Advertisement messages, specified by RFC 2461, to a local Ethernet LAN periodically and when requested by a node sending a Router Solicitation message. These messages are required for IPv6...

Dhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling

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CVE-2026-14258 Dhcpcd: dhcpcd infinite loop and out-of-bounds read via zero-length ipv6 nd option in router advertisement handling

A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser ...

CVE-2026-7656

The IPv6 Neighbor Discovery handlers in subsys/net/ip/ipv6nbr.c handlerainput, handlensinput, handlenainput used an incorrect boolean expression that combined the RFC 4861 validity checks with the ICMPv6 code check using the wrong operator precedence: the form was 'length/hop/source/target checks...

CVE-2026-7656

The CVE affects Zephyr’s IPv6 Neighbor Discovery in subsys/net/ip/ipv6_nbr.c (handle_ra_input/handle_ns_input/handle_na_input). A faulty boolean combining ND validity checks with ICMPv6 code allowed any ND message with code 0 to bypass Hop Limit==255 and multicast/RS/RA validation, enabling forge...

CVE-2026-7656 Broken IPv6 Neighbor Discovery input validation allows spoofed RA/NS/NA acceptance in Zephyr net stack

The IPv6 Neighbor Discovery handlers in subsys/net/ip/ipv6nbr.c handlerainput, handlensinput, handlenainput used an incorrect boolean expression that combined the RFC 4861 validity checks with the ICMPv6 code check using the wrong operator precedence: the form was 'length/hop/source/target checks...

CVE-2026-7656 Broken IPv6 Neighbor Discovery input validation allows spoofed RA/NS/NA acceptance in Zephyr net stack

The IPv6 Neighbor Discovery handlers in subsys/net/ip/ipv6nbr.c handlerainput, handlensinput, handlenainput used an incorrect boolean expression that combined the RFC 4861 validity checks with the ICMPv6 code check using the wrong operator precedence: the form was 'length/hop/source/target checks...

Linux Distros Unpatched Vulnerability : CVE-2026-56116

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an...

CVE-2026-56116

A flaw was found in dhcpcd. An unauthenticated attacker on the same network link can exploit a memory leak vulnerability in the IPv6 Router Advertisement route information handling. By repeatedly sending specially crafted Router Advertisements with a zero lifetime, the attacker can cause the syst...

CVE-2026-56116

dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send...

CVE-2026-56116 dhcpcd Memory Leak DoS via IPv6 Router Advertisement Handling

dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send...

CVE-2026-56116 dhcpcd Memory Leak DoS via IPv6 Router Advertisement Handling

dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send...

CVE-2026-56116

CVE-2026-56116 affects dhcpcd up to version 10.3.2. The vulnerability is in the IPv6 Router Advertisement route information handling, where a memory leak can be triggered by an unauthenticated, same-link attacker sending crafted Router Advertisements. Specifically, Router Advertisements containin...

CVE-2026-56116 dhcpcd Memory Leak DoS via IPv6 Router Advertisement Handling

dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send...

SUSE CVE-2026-48715

radvd is a router advertisement daemon for IPv6. Prior to version 2.21, the radvdump utility shipped with radvd contains a stack buffer overflow in the Route Information option parser. When processing a crafted ICMPv6 Router Advertisement, printff copies up to 2032 bytes from attacker-controlled...

PT-2026-51565

Name of the Vulnerable Software and Affected Versions dhcpcd versions prior to 10.3.2 Description An issue in the IPv6 Router Advertisement route information handling allows an unauthenticated attacker on the same link to cause a denial of service. By repeatedly sending crafted Router...

ALPINE-CVE-2026-48715

radvd is a router advertisement daemon for IPv6. Prior to version 2.21, the radvdump utility shipped with radvd contains a stack buffer overflow in the Route Information option parser. When processing a crafted ICMPv6 Router Advertisement, printff copies up to 2032 bytes from attacker-controlled...

CVE-2026-48715

radvd is a router advertisement daemon for IPv6. Prior to version 2.21, the radvdump utility shipped with radvd contains a stack buffer overflow in the Route Information option parser. When processing a crafted ICMPv6 Router Advertisement, printff copies up to 2032 bytes from attacker-controlled...

[SECURITY] Fedora 44 Update: bird-3.3.1-1.fc44

BIRD is a dynamic IP routing daemon supporting both, IPv4 and IPv6, Border Gateway Protocol BGPv4, Routing Information Protocol RIPv2, RIPng, Open Shortest Path First protocol OSPFv2, OSPFv3, Babel Routing Protocol Babel, Bidirectional Forwarding Detection BFD, IPv6 router advertisements, static...

[SECURITY] Fedora 43 Update: bird-3.3.1-1.fc43

BIRD is a dynamic IP routing daemon supporting both, IPv4 and IPv6, Border Gateway Protocol BGPv4, Routing Information Protocol RIPv2, RIPng, Open Shortest Path First protocol OSPFv2, OSPFv3, Babel Routing Protocol Babel, Bidirectional Forwarding Detection BFD, IPv6 router advertisements, static...