SUSE: Critical Kernel Security Patch for CVE-2025-21971 and CVE-2025-38206
suse
October 23, 2025
* bsc#1245794 * bsc#1246075 * bsc#1248673 * bsc#1248749 * bsc#1249534
Summary
## This update for the Linux Kernel 5.14.21-150500_55_103 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-2025-21971: 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:
References
* bsc#1245794
* bsc#1246075
* bsc#1248673
* bsc#1248749
* bsc#1249534
Cross-
* CVE-2025-21971
* CVE-2025-38206
* CVE-2025-38499
* 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-2025-38206 ( 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
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Severity
important
Lowest
Low
Medium
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Critical
Announcement ID: SUSE-SU-2025:3736-1
Release Date: 2025-10-22T23:42:09Z
Rating: important
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