What is CVE-2026-23943?

CVE-2026-23943 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Pre-auth SSH DoS via unbounded zlib inflate

Which CVE IDs does CVE-2026-23943 cover?

CVE-2026-23943 covers the following CVE IDs: CVE-2026-23943. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-23943?

CVE-2026-23943 affects 2 products, including: azl3 erlang 26.2.5.17-1 on Azure Linux 3.0; cbl2 erlang 25.3.2.21-4 on CBL Mariner 2.0.

CVE-2026-23943Medium

Pre-auth SSH DoS via unbounded zlib inflate

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-23943 →

🎯 Affected products2

azl3 erlang 26.2.5.17-1 on Azure Linux 3.0
cbl2 erlang 25.3.2.21-4 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 26.2.5.18-1 KBCBL-Mariner Releases (Security Update) — fixed build 25.3.2.21-5

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23943
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade