CVE-2026-32288: Unbounded allocation for old GNU sparse in archive/tar

Overview

Severity

Medium (CVSS 5.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Apr

Released

2026-04-11

Last Updated

2026-04-30

EPSS Score

0.29% (percentile: 21.3%)

Affected Products (27)

Open Source Software

• azl3 containerized-data-importer 1.62.0-3 on Azure Linux 3.0
• azl3 gh 2.62.0-15 on Azure Linux 3.0
• azl3 moby-engine 25.0.3-17 on Azure Linux 3.0
• azl3 skopeo 1.14.4-10 on Azure Linux 3.0
• cbl2 containerized-data-importer 1.55.0-28 on CBL Mariner 2.0
• cbl2 cri-o 1.22.3-20 on CBL Mariner 2.0
• azl3 containerized-data-importer 1.62.0-2 on Azure Linux 3.0
• cbl2 gcc 11.2.0-9 on CBL Mariner 2.0
• cbl2 golang 1.18.8-10 on CBL Mariner 2.0
• cbl2 golang 1.22.7-5 on CBL Mariner 2.0
• azl3 gh 2.62.0-13 on Azure Linux 3.0
• azl3 golang 1.25.8-1 on Azure Linux 3.0
• cbl2 libcontainers-common 20210626-7 on CBL Mariner 2.0
• cbl2 moby-engine 24.0.9-19 on CBL Mariner 2.0
• azl3 golang 1.26.1-1 on Azure Linux 3.0
• cbl2 msft-golang 1.25.8-1 on CBL Mariner 2.0
• cbl2 python-tensorboard 2.11.0-3 on CBL Mariner 2.0
• azl3 moby-engine 25.0.3-15 on Azure Linux 3.0
• azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0
• cbl2 skopeo 1.14.2-15 on CBL Mariner 2.0
• cbl2 tensorflow 2.11.1-2 on CBL Mariner 2.0
• azl3 skopeo 1.14.4-9 on Azure Linux 3.0
• azl3 tensorflow 2.16.1-11 on Azure Linux 3.0
• azl3 golang 1.25.9-1 on Azure Linux 3.0
• azl3 golang 1.26.2-1 on Azure Linux 3.0

Mariner

• azl3 gcc 13.2.0-7 on Azure Linux 3.0
• azl3 libcontainers-common 20240213-3 on Azure Linux 3.0

Revision History

• 2026-04-11: Information published.
• 2026-04-14: Information published.
• 2026-04-15: Information published.
• 2026-04-21: Information published.
• 2026-04-23: Information published.
• 2026-04-29: Information published.
• 2026-04-30: Information published.