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SUSE: grub2 Moderate Use-After-Free Flaws SUSE-SU-2025:4143-1

suse
Calendar Grey November 20, 2025
Dist Suse Esm H88
An update for SUSE fixes multiple issues in grub2, including use-after-free and out-of-bounds writes, with moderate severity.
* bsc#1252931 * bsc#1252932 * bsc#1252933 * bsc#1252934 * bsc#1252935

Summary

## This update for grub2 fixes the following issues: * CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931) * CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932) * CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933) * CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934) * CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935) Other fixes: * Bump upstream SBAT generation to 6 ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

Topics%20covered

Topics Covered

security advisory moderate SuSE out-of-bounds use-after-free grub2

References

* bsc#1252931

* bsc#1252932

* bsc#1252933

* bsc#1252934

* bsc#1252935

Cross-

* CVE-2025-54771

* CVE-2025-61661

* CVE-2025-61662

* CVE-2025-61663

* CVE-2025-61664

CVSS scores:

* 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

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

* CVE-2025-61661 ( SUSE ): 4.8 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

* CVE-2025-61661 ( NVD ): 4.8 CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

* CVE-2025-61662 ( 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

Announcement ID: SUSE-SU-2025:4143-1
Release Date: 2025-11-20T07:54:04Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate SuSE out-of-bounds use-after-free grub2

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