What is CVE-2026-33636?

CVE-2026-33636 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. LIBPNG has ARM NEON Palette Expansion Out-of-Bounds Read on AArch64

Which CVE IDs does CVE-2026-33636 cover?

CVE-2026-33636 covers the following CVE IDs: CVE-2026-33636. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-33636?

CVE-2026-33636 has a CVSS v3 base score of 7.6, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-33636?

CVE-2026-33636 affects 2 products, including: azl3 libpng 1.6.55-1 on Azure Linux 3.0; cbl2 libpng 1.6.55-1 on CBL Mariner 2.0.

CVE-2026-33636HighCVSS 7.6

LIBPNG has ARM NEON Palette Expansion Out-of-Bounds Read on AArch64

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-33636 →

🎯 Affected products2

azl3 libpng 1.6.55-1 on Azure Linux 3.0
cbl2 libpng 1.6.55-1 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.6.56-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33636
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade