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SUSE: Linux Kernel Important Security Update 2025:3748-1 CVE-2025-21971 DoS

suse
Calendar Grey October 23, 2025
Dist Suse Esm H88
An important security patch for SUSE Linux Kernel addresses multiple issues, with clear instructions for installation and updates.
* bsc#1245794 * bsc#1246075 * bsc#1247158 * bsc#1247452 * bsc#1248376

Summary

## This update for the Linux Kernel 6.4.0-150600_23_38 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-2025-38396: fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass (bsc#1247158). * CVE-2025-38566: sunrpc: fix handling of server side tls alerts (bsc#1248376). * CVE-2025-21971: net_sched: Prevent creation of classes with TC_H_ROOT (bsc#1245794). * CVE-2025-38110: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access (bsc#1249458). * CVE-2025-38644: wifi: mac80211: reject TDLS operations when station is not

Topics%20covered

Topics Covered

security advisory security update SuSE important patching Linux kernel

References

* bsc#1245794

* bsc#1246075

* bsc#1247158

* bsc#1247452

* bsc#1248376

* bsc#1248673

* bsc#1248749

* bsc#1249458

* bsc#1249534

Cross-

* CVE-2025-21971

* CVE-2025-38110

* CVE-2025-38206

* CVE-2025-38396

* CVE-2025-38471

* CVE-2025-38499

* CVE-2025-38566

* CVE-2025-38644

* CVE-2025-38678

CVSS scores:

* CVE-2025-21971 ( 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-2025-21971 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-38110 ( 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-2025-38110 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-38206 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:H/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-2025:3748-1
Release Date: 2025-10-23T11:34:37Z
Rating: important

Topics%20covered

Topics Covered

security advisory security update SuSE important patching Linux kernel

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