What is CVE-2026-56123?

CVE-2026-56123 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. socat 1.8.0.0 - 1.8.1.1 Heap Buffer Overflow via SOCKS5 Reply Parser

Which CVE IDs does CVE-2026-56123 cover?

CVE-2026-56123 covers the following CVE IDs: CVE-2026-56123. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-56123?

CVE-2026-56123 has a CVSS v3 base score of 8.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-56123?

CVE-2026-56123 affects 1 product, including: azl3 socat 1.7.4.4-2 on Azure Linux 3.0.

CVE-2026-56123CriticalCVSS 8.1

socat 1.8.0.0 - 1.8.1.1 Heap Buffer Overflow via SOCKS5 Reply Parser

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-56123 →

🎯 Affected products1

azl3 socat 1.7.4.4-2 on Azure Linux 3.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56123