CVE-2026-62309

Published: Jul 16, 2026Modified: Jul 18, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-476

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

References (4)

https://github.com/coredns/coredns/commit/60a439dd4febfcd78e3779e952fe3fbf3c16bb1f

Source: security-advisories@github.com

https://github.com/coredns/coredns/pull/8154

Source: security-advisories@github.com

https://github.com/coredns/coredns/releases/tag/v1.14.4

Source: security-advisories@github.com

https://github.com/coredns/coredns/security/advisories/GHSA-9rvv-m5g5-wc8r

Source: security-advisories@github.com

Timeline

No history available yet.