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SUSE: Grub2 Moderate Side-Channel Attack Fix SUSE-SU-2025:02813-1

suse
Calendar Grey August 15, 2025
Dist Suse Esm H88
Important GRUB2 update to mitigate side-channel vulnerabilities on SUSE systems. Execute the update immediately!
* bsc#1234959 * bsc#1246157 * bsc#1246231 * bsc#1246237

Summary

## This update for grub2 fixes the following issues: * CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959) Other fixes: \- Fix test -f and -s do not work properly over the network files served via tftp and http (bsc#1246157, bsc#1246237) \- Skip mount point in grub_find_device function (bsc#1246231) ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * Basesystem Module 15-SP7 zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2025-2813=1 * Server Applications Module 15-SP7 zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP7-2025-2813=1 ## Package List:

Topics%20covered

Topics Covered

security advisory moderate SuSE side-channel attack grub2 recommended

References

* bsc#1234959

* bsc#1246157

* bsc#1246231

* bsc#1246237

Cross-

* CVE-2024-56738

CVSS scores:

* CVE-2024-56738 ( SUSE ): 5.7

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

* CVE-2024-56738 ( SUSE ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

* CVE-2024-56738 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Products:

* Basesystem Module 15-SP7

* Server Applications Module 15-SP7

* SUSE Linux Enterprise Desktop 15 SP7

* SUSE Linux Enterprise Real Time 15 SP7

* SUSE Linux Enterprise Server 15 SP7

* SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves one vulnerability and has three security fixes can now be

installed.

##

* https://www.suse.com/security/cve/CVE-2024-56738.html

Announcement ID: SUSE-SU-2025:02813-1
Release Date: 2025-08-15T12:53:14Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate SuSE side-channel attack grub2 recommended

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