CVE-2026-34180: Heap Buffer Over-read in ASN.1 Content Parsing

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-13

Last Updated

2026-06-23

EPSS Score

1.03% (percentile: 60.0%)

Affected Products (9)

Open Source Software

• azl3 shim-unsigned-aarch64 16.1-2 on Azure Linux 3.0
• azl3 cloud-hypervisor 51.1.56-1 on Azure Linux 3.0
• azl3 edk2 20240524git3e722403cd16-17 on Azure Linux 3.0
• azl3 nodejs 24.14.1-3 on Azure Linux 3.0
• azl3 openssl 3.3.5-5 on Azure Linux 3.0
• azl3 qemu 9.1.0-7 on Azure Linux 3.0
• azl3 rust 1.75.0-29 on Azure Linux 3.0
• azl3 rust 1.90.0-8 on Azure Linux 3.0
• azl3 shim-unsigned-x64 16.1-2 on Azure Linux 3.0

Revision History

• 2026-06-13: Information published.
• 2026-06-18: Information published.
• 2026-06-20: Information published.
• 2026-06-23: Information published.