SUSE-SU-2025:03643-1: important: Security update for the Linux Kernel RT (Live Patch 3 for SLE 15 SP7)

[SLE-UPDATES]

# Security update for the Linux Kernel RT (Live Patch 3 for SLE 15 SP7)

Announcement ID: SUSE-SU-2025:03643-1  
Release Date: 2025-10-18T10:33:40Z  
Rating: important  
References:

  * bsc#1248108
  * bsc#1248376
  * bsc#1248673
  * bsc#1249534

  
Cross-References:

  * CVE-2025-38499
  * CVE-2025-38566
  * CVE-2025-38678

  
CVSS scores:

  * CVE-2025-38499 ( SUSE ):  6.2
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H
  * CVE-2025-38499 ( SUSE ):  8.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
  * CVE-2025-38566 ( SUSE ):  9.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-38566 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-38678 ( SUSE ):  7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

  
Affected Products:

  * SUSE Linux Enterprise Live Patching 15-SP6
  * SUSE Linux Enterprise Live Patching 15-SP7
  * SUSE Linux Enterprise Real Time 15 SP6
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that solves three vulnerabilities and has one security fix can now be
installed.

## Description:

This update for the Linux Kernel 6.4.0-150700_7_13 fixes several issues.

The following security issues were fixed:

  * CVE-2025-38678: netfilter: nf_tables: reject duplicate device on updates
    (bsc#1249534).
  * CVE-2025-38499: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN
    in the right userns (bsc#1248673).
  * CVE-2025-38566: sunrpc: fix handling of server side tls alerts
    (bsc#1248376).
  * kernel-livepatch.spec: Replace kernel-syms with
    kernel-<flavor>-specific dependencies (bsc#1248108) The commit
    ead79afe7cbfae ("kernel-livepatch.spec: Update build dependencies for non-
    default flavors") broke build of livepatches which were built with kernel-
    syms-rt. The problem is that livepatch packages for already released kernels
    are built in exactly the same build environment as the initial livepatch.
    The BS (Build Service) installs the build environment using the given
    _buildinfo-*.xml and ignores BuildRequires. But the BuildRequires are later
    checked by rpmbuild tool. It would complain when new dependencies were
    added. Unfortunately, kernel-syms-rt does not exist on SLE16. This was the
    main motivation for the above mentioned commit. But the package kernel-syms
    is empty. Its only purpose is to add other dependencies. Replace it by
    opencoding the dependencies. Note that the kernel devel files are
    historically split into various packages, kernel-<flavor>-devel,
    kernel-devel-<flavor>, and even kernel-devel. But it is enough to
    require kernel-<flavor>-devel because it requires the other devel
    files on its own. This seems to be true back to SLE15-SP4 at minimum.

## 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 Enterprise Live Patching 15-SP6  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2025-3643=1

  * SUSE Linux Enterprise Live Patching 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP7-2025-3647=1

## Package List:

  * SUSE Linux Enterprise Live Patching 15-SP6 (x86_64)
    * kernel-livepatch-SLE15-SP6-RT_Update_14-debugsource-2-150600.2.1
    * kernel-livepatch-6_4_0-150600_10_49-rt-debuginfo-2-150600.2.1
    * kernel-livepatch-6_4_0-150600_10_49-rt-2-150600.2.1
  * SUSE Linux Enterprise Live Patching 15-SP7 (x86_64)
    * kernel-livepatch-SLE15-SP7-RT_Update_3-debugsource-2-150700.2.1
    * kernel-livepatch-6_4_0-150700_7_13-rt-debuginfo-2-150700.2.1
    * kernel-livepatch-6_4_0-150700_7_13-rt-2-150700.2.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-38499.html
  * https://www.suse.com/security/cve/CVE-2025-38566.html
  * https://www.suse.com/security/cve/CVE-2025-38678.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1248108
  * https://bugzilla.suse.com/show_bug.cgi?id=1248376
  * https://bugzilla.suse.com/show_bug.cgi?id=1248673
  * https://bugzilla.suse.com/show_bug.cgi?id=1249534

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