Security update for the Linux Kernel RT (Live Patch 1 for SUSE Linux Enterprise 16)

Announcement ID: SUSE-SU-2026:20168-1
Release Date: 2026-01-26T11:03:44Z
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2025-39963 ( 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-2025-39963 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2025-40204 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  • CVE-2025-40204 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • CVE-2025-40212 ( 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-2025-40212 ( 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 three vulnerabilities can now be installed.

Description:

This update for the SUSE Linux Enterprise kernel 6.12.0-160000.6.1 fixes various security issues

The following security issues were fixed:

  • CVE-2025-39963: io_uring: fix incorrect io_kiocb reference in io_link_skb (bsc#1251982).
  • CVE-2025-40204: sctp: Fix MAC comparison to be constant-time (bsc#1253437).
  • CVE-2025-40212: nfsd: fix refcount leak in nfsd_set_fh_dentry() (bsc#1254196).

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-6.2-195=1

Package List:

  • SUSE Linux Micro 6.2 (x86_64)
    • kernel-livepatch-SLE16-RT_Update_1-debugsource-3-160000.1.1
    • kernel-livepatch-6_12_0-160000_6-rt-3-160000.1.1
    • kernel-livepatch-6_12_0-160000_6-rt-debuginfo-3-160000.1.1

References: