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SUSE: Kernel RT Important Security Update CVE-2023-53676

suse
Calendar Grey January 19, 2026
Dist Suse Esm H88
SUSE issues security updates for the kernel RT in Enterprise 15 SP7 to fix critical vulnerabilities and improve safety.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for the SUSE Linux Enterprise kernel 6_4_0-150700.7.22 fixes various security issues The following security issues were fixed: * CVE-2023-53676: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() (bsc#1251787). * CVE-2025-40204: sctp: Fix MAC comparison to be constant-time (bsc#1253437). ## 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: * SUSE Linux Enterprise Live Patching 15-SP7 zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP7-2026-147=1 ## Package List: * SUSE Linux Enterprise Live Patching 15-SP7 (x86_64) * kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource-2-150700.2.1

Topics%20covered

Topics Covered

security advisory security issue buffer overflow important SuSE Linux constant time

References

* bsc#1251787

* bsc#1253437

Cross-

* CVE-2023-53676

* CVE-2025-40204

CVSS scores:

* CVE-2023-53676 ( SUSE ): 8.5

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

* CVE-2023-53676 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-40204 ( SUSE ): 8.7

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

* CVE-2025-40204 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Products:

* SUSE Linux Enterprise Live Patching 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 two vulnerabilities can now be installed.

##

* https://www.suse.com/security/cve/CVE-2023-53676.html

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0147-1
Release Date: 2026-01-17T11:33:38Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue buffer overflow important SuSE Linux constant time

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