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CVE-2026-62309

HIGH
7.5
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-62309
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-13 19:27 UTC
Published
2026-07-16 19:42 UTC
Last updated
2026-07-16 19:42 UTC
Primary CWE
CWE-476
CWE-476: NULL Pointer Dereference
Vendor / Product
coredns / coredns
Sources
cve.org  ·  NVD

Severity & Metrics

7.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products (1)
VendorProductPlatformVersions
coredns coredns — < 1.14.4
Weakness (CWE)
CWESourceDescription
CWE-476 cna CWE-476: NULL Pointer Dereference
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References (4)
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