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SUSE: Linux Kernel Important Security Fix CVE-2025-21971 2025:3683-1

suse
Calendar Grey October 20, 2025
Dist Suse Esm H88
Key update for Linux Kernel addressing several important security issues gives essential patch instructions.
* bsc#1245794 * bsc#1246075 * bsc#1248673 * bsc#1248749

Summary

## This update for the Linux Kernel 5.3.18-150300_59_185 fixes several issues. The following security issues were fixed: * CVE-2025-38499: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (bsc#1248673). * CVE-2025-21971: net_sched: Prevent creation of classes with TC_H_ROOT (bsc#1245794). * CVE-2025-38644: wifi: mac80211: reject TDLS operations when station is not associated (bsc#1248749). * CVE-2025-38206: exfat: fix double free in delayed_free (bsc#1246075). ## 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 15.3 zypper in -t patch SUSE-2025-3683=1 * SUSE Linux Enterprise Live Patching 15-SP3

Topics%20covered

Topics Covered

security advisory security issue SuSE software update important Linux kernel

References

* bsc#1245794

* bsc#1246075

* bsc#1248673

* bsc#1248749

Cross-

* CVE-2025-21971

* CVE-2025-38206

* CVE-2025-38499

* CVE-2025-38644

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-2025-38206 ( 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

* CVE-2025-38206 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-38499 ( SUSE ): 6.2

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

* CVE-2025-38499 ( SUSE ): 8.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

* CVE-2025-38644 ( 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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:3683-1
Release Date: 2025-10-20T17:05:07Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue SuSE software update important Linux kernel

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