CVE-2026-33636: LIBPNG has ARM NEON Palette Expansion Out-of-Bounds Read on AArch64

Overview

Severity

High (CVSS 7.6)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Mar

Released

2026-03-29

Last Updated

2026-04-15

EPSS Score

0.05% (percentile: 16.7%)

Affected Products (4)

Open Source Software

• cbl2 tensorflow 2.11.1-2 on CBL Mariner 2.0
• azl3 tensorflow 2.16.1-11 on Azure Linux 3.0
• azl3 libpng 1.6.55-1 on Azure Linux 3.0
• cbl2 libpng 1.6.55-1 on CBL Mariner 2.0

Revision History

• 2026-03-29: Information published.
• 2026-03-30: Information published.
• 2026-03-31: Information published.
• 2026-03-31: Information published.
• 2026-04-02: Information published.
• 2026-04-15: Information published.