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SUSE Linux Kernel Security Fixes for CVE-2025-21791, CVE-2025-38089

suse
Calendar Grey October 7, 2025
Dist Suse Esm H88
Critical security update for SUSE Linux Kernel addressing important vulnerabilities, ensuring system integrity and reliability.
* bsc#1240744 * bsc#1245509 * bsc#1247315 Cross-References:

Summary

## This update for the Linux Kernel 6.4.0-150600_10_29 fixes several issues. The following security issues were fixed: * CVE-2025-38477: net/sched: sch_qfq: Fix race condition on qfq_aggregate (bsc#1247315). * CVE-2025-21791: vrf: use RCU protection in l3mdev_l3_out() (bsc#1240744). * CVE-2025-38089: sunrpc: handle SVC_GARBAGE during svc auth processing as auth error (bsc#1245509). ## 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-SP6-2025-3476=1 ## Package List: * SUSE Linux Enterprise Live Patching 15-SP6 (x86_64)

Topics%20covered

Topics Covered

security advisory denial of service SuSE patch important kernel

References

* bsc#1240744

* bsc#1245509

* bsc#1247315

Cross-

* CVE-2025-21791

* CVE-2025-38089

* CVE-2025-38477

CVSS scores:

* CVE-2025-21791 ( SUSE ): 8.5

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2025-21791 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-21791 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-21791 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-38089 ( 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-2025-38089 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2025-38477 ( 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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:03476-1
Release Date: 2025-10-07T15:07:56Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service SuSE patch important kernel

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