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SUSE Linux Micro 6.0 Grub2 Moderate Security Update 2026-21621-1

suse
Calendar Grey May 15, 2026
Scroller Suse
An update for SUSE Grub2 addresses six vulnerabilities, recommended for improved system security.

An update that solves six vulnerabilities can now be installed.

Summary

## This update for grub2 fixes the following issues * CVE-2025-54770: Missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930). * CVE-2025-54771: grub_file_close() does not properly controls the fs refcount (bsc#1252931). * CVE-2025-61661: Out-of-bounds write in grub_usb_get_string() function (bsc#1252932). * CVE-2025-61662: Missing unregister call for gettext command may lead to use- after-free (bsc#1252933). * CVE-2025-61663: Missing unregister call for normal commands may lead to use- after-free (bsc#1252934). * CVE-2025-61664: Missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935). Changes for grub2: * Bump upstream SBAT generation to 6 ## Patch Instructions:

Topics%20covered

Topics Covered

security advisory moderate update SuSE access control grub2

References

* bsc#1252930

* bsc#1252931

* bsc#1252932

* bsc#1252933

* bsc#1252934

* bsc#1252935

Cross-

* CVE-2025-54770

* CVE-2025-54771

* CVE-2025-61661

* CVE-2025-61662

* CVE-2025-61663

* CVE-2025-61664

CVSS scores:

* CVE-2025-54770 ( SUSE ): 2.1

CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

* CVE-2025-54770 ( SUSE ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

* CVE-2025-54770 ( NVD ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

* CVE-2025-54771 ( SUSE ): 2.1

CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

* CVE-2025-54771 ( SUSE ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

* CVE-2025-54771 ( NVD ): 4.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

* CVE-2025-61661 ( SUSE ): 4.3

Severity
critical
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21621-1
Release Date: 2026-05-11T08:46:20Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate update SuSE access control grub2

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