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SUSE Linux Micro 6.0 Important Kernel RT Security Fix 2026-20455-1

suse
Calendar Grey February 26, 2026
Dist Suse Esm H88
SUSE Linux Kernel RT update addresses critical security flaws. Immediate installation is necessary for safety.
An update that solves five vulnerabilities and has two fixes can now be installed.

Summary

## This update for the SUSE Linux Enterprise kernel 6.4.0-25.1 fixes various security issues The following security issues were fixed: * CVE-2025-38111: net/mdiobus: Fix potential out-of-bounds read/write access (bsc#1249455). * 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

Topics%20covered

Topics Covered

security advisory SuSE important kernel access divided-zero

References

* bsc#1249205

* bsc#1249241

* bsc#1249455

* bsc#1249480

* bsc#1253439

* bsc#1253473

* bsc#1256928

Cross-

* CVE-2025-38111

* CVE-2025-38352

* CVE-2025-39742

* CVE-2025-40129

* CVE-2025-40186

CVSS scores:

* CVE-2025-38111 ( 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-2025-38111 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-38111 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

* 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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20455-1
Release Date: 2026-02-19T06:32:11Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important kernel access divided-zero

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