CVE-2025-61663: Grub2: missing unregister call for normal commands may lead to use-after-free

Overview

Severity

Medium (CVSS 4.9)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2025-Nov

Released

2025-11-21

Last Updated

2026-01-08

EPSS Score

0.03% (percentile: 9.0%)

Affected Products (4)

Open Source Software

• cbl2 grub2 2.06-15 on CBL Mariner 2.0
• azl3 grub2 2.06-25 on Azure Linux 3.0

Other

• 20771-17086
• 20796-17084

Revision History

• 2025-11-21: Information published.
• 2025-12-13: Information published.
• 2025-12-17: Information published.
• 2026-01-03: Information published.
• 2026-01-08: Information published.