CVE-2026-62309 | BDVDB-2026-349028 Detail

Description#

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, reassigns addr from a nil readFrom result after parseProxyProtocol errors, and calls addr.String() in the warning log before ServeDNS recovery applies. This issue is fixed in version 1.14.4.

Impact#

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Exploit#

History#

1. Version 12026-07-16Record published in the CVE List.
2. Version 22026-07-18Most recent update recorded in the CVE List.