SUSE-SU-2026:20645-1: important: Security update for the Linux Kernel RT (Live Patch 0 for SUSE Linux Enterprise 16)

Mon Mar 9 08:30:54 UTC 2026

# Security update for the Linux Kernel RT (Live Patch 0 for SUSE Linux
Enterprise 16)

Announcement ID: SUSE-SU-2026:20645-1  
Release Date: 2026-03-04T10:13:56Z  
Rating: important  
References:

  * bsc#1249205
  * bsc#1249241
  * bsc#1249480
  * bsc#1250190
  * bsc#1253439
  * bsc#1253473
  * bsc#1256928

Cross-References:

  * CVE-2025-38352
  * CVE-2025-39698
  * 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-2025-39698 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-39698 ( NVD ):  8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  * CVE-2025-39698 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
  * CVE-2025-40129 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-40186 ( 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-2025-40186 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:

  * SUSE Linux Micro 6.2

An update that solves five vulnerabilities and has two fixes can now be
installed.

## Description:

This update for the SUSE Linux Enterprise kernel 6.12.0-160000.5.1 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-2025-39698: io_uring/futex: ensure io_futex_wait() cleans up properly on
    failure (bsc#1250190).
  * 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.
    (bsc#1249241 bsc#1256928).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Micro 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-351=1

## Package List:

  * SUSE Linux Micro 6.2 (x86_64)
    * kernel-livepatch-6_12_0-160000_5-rt-debuginfo-5-160000.3.4
    * kernel-livepatch-SLE16-RT_Update_0-debugsource-5-160000.3.4
    * kernel-livepatch-6_12_0-160000_5-rt-5-160000.3.4

## References:

  * https://www.suse.com/security/cve/CVE-2025-38352.html
  * https://www.suse.com/security/cve/CVE-2025-39698.html
  * https://www.suse.com/security/cve/CVE-2025-39742.html
  * https://www.suse.com/security/cve/CVE-2025-40129.html
  * https://www.suse.com/security/cve/CVE-2025-40186.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1249205
  * https://bugzilla.suse.com/show_bug.cgi?id=1249241
  * https://bugzilla.suse.com/show_bug.cgi?id=1249480
  * https://bugzilla.suse.com/show_bug.cgi?id=1250190
  * https://bugzilla.suse.com/show_bug.cgi?id=1253439
  * https://bugzilla.suse.com/show_bug.cgi?id=1253473
  * https://bugzilla.suse.com/show_bug.cgi?id=1256928

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