openSUSE: Important Patch for Buffer Overflow & MAC Clash CVE-2023-53676
opensuse
January 21, 2026
An update that solves two vulnerabilities can now be installed.
Description
This update for the SUSE Linux Enterprise kernel 6.4.0-150600.23.73 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).
Topics Covered
Patch
## 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:
* openSUSE Leap 15.6
zypper in -t patch SUSE-2026-204=1
* SUSE Linux Enterprise Live Patching 15-SP6
zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2026-204=1
Package List
* openSUSE Leap 15.6 (ppc64le s390x x86_64)
* kernel-livepatch-SLE15-SP6_Update_16-debugsource-2-150600.2.1
* kernel-livepatch-6_4_0-150600_23_73-default-debuginfo-2-150600.2.1
* kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1
* SUSE Linux Enterprise Live Patching 15-SP6 (ppc64le s390x x86_64)
* kernel-livepatch-SLE15-SP6_Update_16-debugsource-2-150600.2.1
* kernel-livepatch-6_4_0-150600_23_73-default-debuginfo-2-150600.2.1
* kernel-livepatch-6_4_0-150600_23_73-default-2-150600.2.1
References
* bsc#1251787
* bsc#1253437
## References:
* https://www.suse.com/security/cve/CVE-2023-53676.html
* https://www.suse.com/security/cve/CVE-2025-40204.html
* https://bugzilla.suse.com/show_bug.cgi?id=1251787
* https://bugzilla.suse.com/show_bug.cgi?id=1253437
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Severity
important
Lowest
Low
Medium
High
Critical
Announcement ID: SUSE-SU-2026:0204-1
Release Date: 2026-01-21T13:33:36Z
Affected Products:
* openSUSE Leap 15.6
* SUSE Linux Enterprise Live Patching 15-SP6
* SUSE Linux Enterprise Real Time 15 SP6
* SUSE Linux Enterprise Server 15 SP6
* SUSE Linux Enterprise Server for SAP Applications 15 SP6
Topics Covered
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