Security update for the Linux Kernel (Live Patch 33 for SLE 15 SP4) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:3705-1 Final 1 1 2025-10-21T13:34:07Z current 2025-10-21T13:34:07Z 2025-10-21T13:34:07Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 33 for SLE 15 SP4) This update for the Linux Kernel 5.14.21-150400_24_141 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). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2025-3705,SUSE-SLE-Module-Live-Patching-15-SP4-2025-3705 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-20253705-1/ Link for SUSE-SU-2025:3705-1 https://lists.suse.com/pipermail/sle-updates/2025-October/042243.html E-Mail link for SUSE-SU-2025:3705-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1245794 SUSE Bug 1245794 https://bugzilla.suse.com/1246075 SUSE Bug 1246075 https://bugzilla.suse.com/1248673 SUSE Bug 1248673 https://bugzilla.suse.com/1248749 SUSE Bug 1248749 https://bugzilla.suse.com/1249534 SUSE Bug 1249534 https://www.suse.com/security/cve/CVE-2025-21971/ SUSE CVE CVE-2025-21971 page https://www.suse.com/security/cve/CVE-2025-38206/ SUSE CVE CVE-2025-38206 page https://www.suse.com/security/cve/CVE-2025-38499/ SUSE CVE CVE-2025-38499 page https://www.suse.com/security/cve/CVE-2025-38644/ SUSE CVE CVE-2025-38644 page https://www.suse.com/security/cve/CVE-2025-38678/ SUSE CVE CVE-2025-38678 page SUSE Linux Enterprise Live Patching 15 SP4 kernel-livepatch-5_14_21-150400_24_141-default-16-150400.2.1 kernel-livepatch-5_14_21-150400_24_141-default-16-150400.2.1 as a component of SUSE Linux Enterprise Live Patching 15 SP4 In the Linux kernel, the following vulnerability has been resolved: net_sched: Prevent creation of classes with TC_H_ROOT The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created with classid TC_H_ROOT, the traversal terminates prematurely at this class instead of reaching the actual root qdisc, causing parent statistics to be incorrectly maintained. In case of DRR, this could lead to a crash as reported by Mingi Cho. Prevent the creation of any Qdisc class with classid TC_H_ROOT (0xFFFFFFFF) across all qdisc types, as suggested by Jamal. CVE-2025-21971 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_141-default-16-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20253705-1/ https://www.suse.com/security/cve/CVE-2025-21971.html CVE-2025-21971 https://bugzilla.suse.com/1240799 SUSE Bug 1240799 https://bugzilla.suse.com/1245794 SUSE Bug 1245794 In the Linux kernel, the following vulnerability has been resolved: exfat: fix double free in delayed_free The double free could happen in the following path. exfat_create_upcase_table() exfat_create_upcase_table() : return error exfat_free_upcase_table() : free ->vol_utbl exfat_load_default_upcase_table : return error exfat_kill_sb() delayed_free() exfat_free_upcase_table() <--------- double free This patch set ->vol_util as NULL after freeing it. CVE-2025-38206 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_141-default-16-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20253705-1/ https://www.suse.com/security/cve/CVE-2025-38206.html CVE-2025-38206 https://bugzilla.suse.com/1246073 SUSE Bug 1246073 https://bugzilla.suse.com/1246075 SUSE Bug 1246075 In the Linux kernel, the following vulnerability has been resolved: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to undo. "Wouldn't be able to undo" may be a result of MNT_LOCKED on a child, but it may also come from lacking admin rights in the userns of the namespace mount belongs to. clone_private_mnt() checks the former, but not the latter. There's a number of rather confusing CAP_SYS_ADMIN checks in various userns during the mount, especially with the new mount API; they serve different purposes and in case of clone_private_mnt() they usually, but not always end up covering the missing check mentioned above. CVE-2025-38499 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_141-default-16-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20253705-1/ https://www.suse.com/security/cve/CVE-2025-38499.html CVE-2025-38499 https://bugzilla.suse.com/1247976 SUSE Bug 1247976 https://bugzilla.suse.com/1248673 SUSE Bug 1248673 In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reject TDLS operations when station is not associated syzbot triggered a WARN in ieee80211_tdls_oper() by sending NL80211_TDLS_ENABLE_LINK immediately after NL80211_CMD_CONNECT, before association completed and without prior TDLS setup. This left internal state like sdata->u.mgd.tdls_peer uninitialized, leading to a WARN_ON() in code paths that assumed it was valid. Reject the operation early if not in station mode or not associated. CVE-2025-38644 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_141-default-16-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20253705-1/ https://www.suse.com/security/cve/CVE-2025-38644.html CVE-2025-38644 https://bugzilla.suse.com/1248748 SUSE Bug 1248748 https://bugzilla.suse.com/1248749 SUSE Bug 1248749 In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject duplicate device on updates A chain/flowtable update with duplicated devices in the same batch is possible. Unfortunately, netdev event path only removes the first device that is found, leaving unregistered the hook of the duplicated device. Check if a duplicated device exists in the transaction batch, bail out with EEXIST in such case. WARNING is hit when unregistering the hook: [49042.221275] WARNING: CPU: 4 PID: 8425 at net/netfilter/core.c:340 nf_hook_entry_head+0xaa/0x150 [49042.221375] CPU: 4 UID: 0 PID: 8425 Comm: nft Tainted: G S 6.16.0+ #170 PREEMPT(full) [...] [49042.221382] RIP: 0010:nf_hook_entry_head+0xaa/0x150 CVE-2025-38678 SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_24_141-default-16-150400.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-20253705-1/ https://www.suse.com/security/cve/CVE-2025-38678.html CVE-2025-38678 https://bugzilla.suse.com/1249126 SUSE Bug 1249126 https://bugzilla.suse.com/1249534 SUSE Bug 1249534