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SUSE Linux Enterprise 16 Kernel Security Update CVE-2025-39963 Released

suse
Calendar Grey February 2, 2026
Dist Suse Esm H88
This SUSE Linux kernel update addresses crucial security patches to enhance system protection and fix vulnerabilities.
An update that solves three vulnerabilities and has one fix can now be installed.

Summary

## 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). The following non security issues was fixed: * Explicitly add module-common.c with vermagic and retpoline modinfo (bsc#1252270). ## 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-6.2-205=1 ## Package List:

Topics%20covered

Topics Covered

security advisory security issue SuSE DoS important kernel

References

* bsc#1251982

* bsc#1252270

* bsc#1253437

* bsc#1254196

Cross-

* CVE-2025-39963

* CVE-2025-40204

* CVE-2025-40212

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 and has one fix can now be

installed.

##

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20171-1
Release Date: 2026-01-28T10:28:18Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue SuSE DoS important kernel

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