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SUSE Linux Micro 6.0 Kernel RT Important Patch Update 2026-20516-1

suse
Calendar Grey February 27, 2026
Dist Suse Esm H88
SUSE releases important kernel update solving multiple security issues. Apply patch to enhance system security now.
An update that solves four vulnerabilities and has two fixes can now be installed.

Summary

## This update for the SUSE Linux Enterprise kernel 6.4.0-34.1 fixes various security issues The following security issues were fixed: * CVE-2025-38352: posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del() (bsc#1249205). * CVE-2025-39742: RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask() (bsc#1249480). * CVE-2025-40129: sunrpc: fix null pointer dereference on zero-length checksum (bsc#1253473). * CVE-2025-40186: tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request() (bsc#1253439). The following non security issue was fixed: * bsc#1249241: fix addr_bit_set() issue on big-endian machines BITOP_BE32_SWIZZLE ought to be defined depending on the target's endianess, but the livepatch includes only the little-endian variant. Fix that.

Topics%20covered

Topics Covered

security advisory denial of service security issue SuSE important kernel

References

* bsc#1249205

* bsc#1249241

* bsc#1249480

* bsc#1253439

* bsc#1253473

* bsc#1256928

Cross-

* CVE-2025-38352

* CVE-2025-39742

* CVE-2025-40129

* CVE-2025-40186

CVSS scores:

* CVE-2025-38352 ( 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-2025-38352 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-38352 ( NVD ): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-39742 ( 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-2025-39742 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-39742 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

* CVE-2025-40129 ( SUSE ): 8.7

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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20516-1
Release Date: 2026-02-19T09:19:11Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service security issue SuSE important kernel

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