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SUSE Linux Micro 6.1 Kernel Essential Security Fixes for Issue 2026-21255-1

suse
Calendar Grey April 23, 2026
Dist Suse Esm H88
Important update for SUSE Linux Micro 6.1 kernel addresses 59 issues. Reboot after installation for security fixes.
An update that solves 59 vulnerabilities and has 21 fixes can now be installed.

Summary

## The SUSE Linux Micro (RT) 6.0 and 6.1 kernel was updated to fix various security issues The following security issues 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 (bsc#1256784).

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#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#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

* bsc#1259998

* bsc#1260005

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21255-1
Release Date: 2026-04-17T17:38:17Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue buffer overflow SuSE important kernel

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