What is CVE-2026-62309?

CVE-2026-62309 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS

Which CVE IDs does CVE-2026-62309 cover?

CVE-2026-62309 covers the following CVE IDs: CVE-2026-62309. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-62309?

CVE-2026-62309 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-62309?

CVE-2026-62309 affects 1 product, including: azl3 coredns 1.11.4-17 on Azure Linux 3.0.

CVE-2026-62309HighCVSS 7.5

CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS

Vendor

Microsoft Security Response Center (MSRC)

Published

July 18, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-62309 →

🎯 Affected products1

azl3 coredns 1.11.4-17 on Azure Linux 3.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62309