CVE-2026-34743: XZ Utils: Buffer overflow in lzma_index_append()

Overview

Severity

N/A

Exploit Status

Not Exploited

Patch Tuesday

2026-Apr

Released

2026-04-04

Last Updated

2026-04-15

EPSS Score

0.06% (percentile: 18.7%)

Affected Products (7)

Mariner

• azl3 xz 5.4.4-2 on Azure Linux 3.0

Open Source Software

• cbl2 cmake 3.21.4-23 on CBL Mariner 2.0
• cbl2 xz 5.2.5-1 on CBL Mariner 2.0
• azl3 rust 1.75.0-27 on Azure Linux 3.0
• cbl2 rust 1.72.0-15 on CBL Mariner 2.0
• azl3 rust 1.90.0-6 on Azure Linux 3.0
• azl3 xz 5.4.4-3 on Azure Linux 3.0

Revision History

• 2026-04-04: Information published.
• 2026-04-07: Information published.
• 2026-04-09: Information published.
• 2026-04-11: Information published.
• 2026-04-14: Information published.
• 2026-04-15: Information published.