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SUSE Linux Enterprise 15 SP6 Kernel Important Update DoS CVE-2025-40129

suse
Calendar Grey February 16, 2026
Dist Suse Esm H88
A security update for SUSE Linux solves important vulnerabilities in the kernel, enhancing system safety and stability.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for the SUSE Linux Enterprise kernel 6.4.0-150600.23.73 fixes various security issues The following security issues were fixed: * 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). ## 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: * openSUSE Leap 15.6 zypper in -t patch SUSE-2026-551=1 SUSE-2026-552=1 * SUSE Linux Enterprise Live Patching 15-SP6 zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2026-551=1 SUSE-SLE- Module-Live-Patching-15-SP6-2026-552=1 ## Package List:

Topics%20covered

Topics Covered

security advisory SuSE important kernel null pointer TCP

References

* bsc#1253439

* bsc#1253473

Cross-

* CVE-2025-40129

* CVE-2025-40186

CVSS scores:

* 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:

* openSUSE Leap 15.6

* SUSE Linux Enterprise Live Patching 15-SP6

* SUSE Linux Enterprise Real Time 15 SP6

* SUSE Linux Enterprise Server 15 SP6

* SUSE Linux Enterprise Server for SAP Applications 15 SP6

An update that solves two vulnerabilities can now be installed.

##

* https://www.suse.com/security/cve/CVE-2025-40129.html

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0551-1
Release Date: 2026-02-16T07:03:54Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important kernel null pointer TCP

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