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SUSE Linux Micro Kernel Important Security Update 2026-21129-1

suse
Calendar Grey April 17, 2026
Dist Suse Esm H88
A critical update for SUSE Linux kernel resolves 61 issues and improves system security for users.
An update that solves 61 vulnerabilities and has 21 fixes can now be installed.

Summary

## The SUSE Linux Enterprise Micro 6.0 and 6.1 kernel was updated to receive various security bugfixes. The following security bugs were fixed: * CVE-2024-38542: RDMA/mana_ib: boundary check before installing cq callbacks (bsc#1226591). * CVE-2025-39817: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare (bsc#1249998). * CVE-2025-39998: scsi: target: target_core_configfs: Add length check to avoid buffer overflow (bsc#1252073). * CVE-2025-40201: kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths (bsc#1253455). * CVE-2025-40253: s390/ctcm: Fix double-kfree (bsc#1255084). * CVE-2025-68794: iomap: adjust read range correctly for non-block-aligned positions (bsc#1256647). * CVE-2025-71125: tracing: Do not register unsupported perf events

Topics%20covered

Topics Covered

security advisory security issue buffer overflow SuSE important kernel

References

* bsc#1226591

* bsc#1245728

* bsc#1249998

* bsc#1251135

* bsc#1251186

* bsc#1251971

* bsc#1252073

* bsc#1252266

* bsc#1253049

* bsc#1253455

* bsc#1254306

* bsc#1255084

* bsc#1256645

* bsc#1256647

* bsc#1256690

* bsc#1256784

* bsc#1257183

* bsc#1257466

* bsc#1257472

* bsc#1257473

* bsc#1257506

* bsc#1257561

* bsc#1257682

* bsc#1257732

* bsc#1257755

* bsc#1257773

* bsc#1257777

* bsc#1257814

* bsc#1257952

* bsc#1258280

* bsc#1258286

* bsc#1258293

* bsc#1258303

* bsc#1258305

* bsc#1258330

* bsc#1258337

* bsc#1258338

* bsc#1258340

* bsc#1258376

* bsc#1258389

* bsc#1258414

* bsc#1258424

* bsc#1258447

* bsc#1258524

* bsc#1258832

* bsc#1258849

* bsc#1259188

* bsc#1259461

* bsc#1259580

* bsc#1259707

* bsc#1259795

* bsc#1259797

* bsc#1259865

* bsc#1259870

* bsc#1259886

* bsc#1259889

* bsc#1259891

* bsc#1259997

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21129-1
Release Date: 2026-04-13T18:28:29Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue buffer overflow SuSE important kernel

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