Security update for kernel-livepatch-MICRO-6-0-RT_Update_11 SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:20880-1 Final 1 1 2025-10-24T10:10:54Z current 2025-10-24T10:10:54Z 2025-10-24T10:10:54Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for kernel-livepatch-MICRO-6-0-RT_Update_11 This update for kernel-livepatch-MICRO-6-0-RT_Update_11 fixes the following issues: - CVE-2025-38566: sunrpc: fix handling of server side tls alerts (bsc#1248376) - CVE-2025-38499: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (bsc#1248673) - CVE-2025-38678: netfilter: nf_tables: reject duplicate device on updates (bsc#1249534) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-SLE-Micro-6.0-kernel-170 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-202520880-1/ Link for SUSE-SU-2025:20880-1 https://lists.suse.com/pipermail/sle-security-updates/2025-October/023050.html E-Mail link for SUSE-SU-2025:20880-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1248108 SUSE Bug 1248108 https://bugzilla.suse.com/1248376 SUSE Bug 1248376 https://bugzilla.suse.com/1248673 SUSE Bug 1248673 https://bugzilla.suse.com/1249534 SUSE Bug 1249534 https://www.suse.com/security/cve/CVE-2025-38499/ SUSE CVE CVE-2025-38499 page https://www.suse.com/security/cve/CVE-2025-38566/ SUSE CVE CVE-2025-38566 page https://www.suse.com/security/cve/CVE-2025-38678/ SUSE CVE CVE-2025-38678 page SUSE Linux Micro 6.0 kernel-livepatch-6_4_0-35-rt-2-1.1 kernel-livepatch-6_4_0-35-rt-2-1.1 as a component of SUSE Linux Micro 6.0 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 Micro 6.0:kernel-livepatch-6_4_0-35-rt-2-1.1 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-202520880-1/ 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: sunrpc: fix handling of server side tls alerts Scott Mayhew discovered a security exploit in NFS over TLS in tls_alert_recv() due to its assumption it can read data from the msg iterator's kvec.. kTLS implementation splits TLS non-data record payload between the control message buffer (which includes the type such as TLS aler or TLS cipher change) and the rest of the payload (say TLS alert's level/description) which goes into the msg payload buffer. This patch proposes to rework how control messages are setup and used by sock_recvmsg(). If no control message structure is setup, kTLS layer will read and process TLS data record types. As soon as it encounters a TLS control message, it would return an error. At that point, NFS can setup a kvec backed msg buffer and read in the control message such as a TLS alert. Msg iterator can advance the kvec pointer as a part of the copy process thus we need to revert the iterator before calling into the tls_alert_recv. CVE-2025-38566 SUSE Linux Micro 6.0:kernel-livepatch-6_4_0-35-rt-2-1.1 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-202520880-1/ https://www.suse.com/security/cve/CVE-2025-38566.html CVE-2025-38566 https://bugzilla.suse.com/1248374 SUSE Bug 1248374 https://bugzilla.suse.com/1248376 SUSE Bug 1248376 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 Micro 6.0:kernel-livepatch-6_4_0-35-rt-2-1.1 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-202520880-1/ 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