CVE-2026-62309

EUVD-2026-45019

16.07.2026, 20:16

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 49.18%

Affected Products (NVD)

Vendor	Product	Version
coredns.io	coredns	𝑥 < 1.14.4

𝑥

= Vulnerable software versions

Known Exploits!

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

Common Weakness Enumeration

CWE-476 - NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

References

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

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

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

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