CVE-2026-62309

A flaw was found in CoreDNS. A remote attacker can send a specially crafted 28-byte UDP datagram to a CoreDNS server with the proxyproto plugin enabled. This malformed datagram can cause the CoreDNS process to crash, leading to a denial of service DoS. The vulnerability arises from improper...

NULL Pointer Dereference

Overview Affected versions of this package are vulnerable to NULL Pointer Dereference via the proxyproto plugin when handling a PROXY v2 datagram with a non-UDP transport. An attacker can cause the process to crash by sending a specially crafted 28-byte UDP packet when the plugin is enabled...

CVE-2026-62309: NULL Pointer Dereference

CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11,...