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SUSE Linux Micro 6.0 kernel RT Essential Security Patch 2026-20855-1

suse
Calendar Grey March 27, 2026
Dist Suse Esm H88
Update addresses seven important issues in kernel RT for SUSE Linux Micro 6.0, keeping systems secure and operational.
An update that solves seven vulnerabilities can now be installed.

Summary

## This update for the SUSE Linux Enterprise Kernel 6.4.0-37.1 fixes various security issues The following security issues were fixed: * CVE-2025-40258: mptcp: fix race condition in mptcp_schedule_work() (bsc#1255053). * CVE-2025-40284: Bluetooth: MGMT: cancel mesh send timer when hdev removed (bsc#1257669). * CVE-2025-40297: net: bridge: fix use-after-free due to MST port state bypass (bsc#1255895). * CVE-2025-68284: libceph: prevent potential out-of-bounds writes in handle_auth_session_key() (bsc#1255378). * CVE-2025-68285: libceph: fix potential use-after-free in have_mon_and_osd_map() (bsc#1255402). * CVE-2025-68813: ipvs: fix ipv4 null-ptr-deref in route error path (bsc#1256644). * CVE-2025-71085: ipv6: BUG() in pskb_expand_head() as part of

Topics%20covered

Topics Covered

security advisory denial of service security issue important kernel-rt SUSE Linux Micro

References

* bsc#1255053

* bsc#1255378

* bsc#1255402

* bsc#1255895

* bsc#1256624

* bsc#1256644

* bsc#1257669

Cross-

* CVE-2025-40258

* CVE-2025-40284

* CVE-2025-40297

* CVE-2025-68284

* CVE-2025-68285

* CVE-2025-68813

* CVE-2025-71085

CVSS scores:

* CVE-2025-40258 ( SUSE ): 7.3

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

* CVE-2025-40258 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-40284 ( 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-2025-40284 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-40297 ( SUSE ): 7.3

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

* CVE-2025-40297 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20855-1
Release Date: 2026-03-24T16:48:56Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service security issue important kernel-rt SUSE Linux Micro

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