Security update for the Linux Kernel (Live Patch 29 for SUSE Linux Enterprise 15 SP5) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2026:0186-1 Final 1 1 2026-01-20T12:45:55Z current 2026-01-20T12:45:55Z 2026-01-20T12:45:55Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 29 for SUSE Linux Enterprise 15 SP5) This update for the SUSE Linux Enterprise kernel 5.14.21-150500.55.116 fixes various security issues The following security issues were fixed: - CVE-2022-50327: ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value (bsc#1254451). - CVE-2022-50409: net: If sock is dead don't access sock's sk_wq in sk_stream_wait_memory (bsc#1250665). - CVE-2022-50490: bpf: Propagate error from htab_lock_bucket() to userspace (bsc#1251165). - CVE-2023-53676: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() (bsc#1251787). - CVE-2024-58239: tls: stop recv() if initial process_rx_list gave us non-DATA (bsc#1248615). - CVE-2025-38476: rpl: Fix use-after-free in rpl_do_srh_inline() (bsc#1251203). - CVE-2025-38572: ipv6: reject malicious packets in ipv6_gso_segment() (bsc#1248400). - CVE-2025-38608: bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls (bsc#1248670). - CVE-2025-40204: sctp: Fix MAC comparison to be constant-time (bsc#1253437). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2026-186,SUSE-SLE-Module-Live-Patching-15-SP5-2026-186 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2026/suse-su-20260186-1/ Link for SUSE-SU-2026:0186-1 https://lists.suse.com/pipermail/sle-security-updates/2026-January/023825.html E-Mail link for SUSE-SU-2026:0186-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1248400 SUSE Bug 1248400 https://bugzilla.suse.com/1248615 SUSE Bug 1248615 https://bugzilla.suse.com/1248670 SUSE Bug 1248670 https://bugzilla.suse.com/1250665 SUSE Bug 1250665 https://bugzilla.suse.com/1251165 SUSE Bug 1251165 https://bugzilla.suse.com/1251203 SUSE Bug 1251203 https://bugzilla.suse.com/1251787 SUSE Bug 1251787 https://bugzilla.suse.com/1253437 SUSE Bug 1253437 https://bugzilla.suse.com/1254451 SUSE Bug 1254451 https://www.suse.com/security/cve/CVE-2022-50327/ SUSE CVE CVE-2022-50327 page https://www.suse.com/security/cve/CVE-2022-50409/ SUSE CVE CVE-2022-50409 page https://www.suse.com/security/cve/CVE-2022-50490/ SUSE CVE CVE-2022-50490 page https://www.suse.com/security/cve/CVE-2023-53676/ SUSE CVE CVE-2023-53676 page https://www.suse.com/security/cve/CVE-2024-58239/ SUSE CVE CVE-2024-58239 page https://www.suse.com/security/cve/CVE-2025-38476/ SUSE CVE CVE-2025-38476 page https://www.suse.com/security/cve/CVE-2025-38572/ SUSE CVE CVE-2025-38572 page https://www.suse.com/security/cve/CVE-2025-38608/ SUSE CVE CVE-2025-38608 page https://www.suse.com/security/cve/CVE-2025-40204/ SUSE CVE CVE-2025-40204 page SUSE Linux Enterprise Live Patching 15 SP5 kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 as a component of SUSE Linux Enterprise Live Patching 15 SP5 In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value The return value of acpi_fetch_acpi_dev() could be NULL, which would cause a NULL pointer dereference to occur in acpi_device_hid(). [ rjw: Subject and changelog edits, added empty line after if () ] CVE-2022-50327 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2022-50327.html CVE-2022-50327 https://bugzilla.suse.com/1249859 SUSE Bug 1249859 https://bugzilla.suse.com/1254451 SUSE Bug 1254451 In the Linux kernel, the following vulnerability has been resolved: net: If sock is dead don't access sock's sk_wq in sk_stream_wait_memory Fixes the below NULL pointer dereference: [...] [ 14.471200] Call Trace: [ 14.471562] <TASK> [ 14.471882] lock_acquire+0x245/0x2e0 [ 14.472416] ? remove_wait_queue+0x12/0x50 [ 14.473014] ? _raw_spin_lock_irqsave+0x17/0x50 [ 14.473681] _raw_spin_lock_irqsave+0x3d/0x50 [ 14.474318] ? remove_wait_queue+0x12/0x50 [ 14.474907] remove_wait_queue+0x12/0x50 [ 14.475480] sk_stream_wait_memory+0x20d/0x340 [ 14.476127] ? do_wait_intr_irq+0x80/0x80 [ 14.476704] do_tcp_sendpages+0x287/0x600 [ 14.477283] tcp_bpf_push+0xab/0x260 [ 14.477817] tcp_bpf_sendmsg_redir+0x297/0x500 [ 14.478461] ? __local_bh_enable_ip+0x77/0xe0 [ 14.479096] tcp_bpf_send_verdict+0x105/0x470 [ 14.479729] tcp_bpf_sendmsg+0x318/0x4f0 [ 14.480311] sock_sendmsg+0x2d/0x40 [ 14.480822] ____sys_sendmsg+0x1b4/0x1c0 [ 14.481390] ? copy_msghdr_from_user+0x62/0x80 [ 14.482048] ___sys_sendmsg+0x78/0xb0 [ 14.482580] ? vmf_insert_pfn_prot+0x91/0x150 [ 14.483215] ? __do_fault+0x2a/0x1a0 [ 14.483738] ? do_fault+0x15e/0x5d0 [ 14.484246] ? __handle_mm_fault+0x56b/0x1040 [ 14.484874] ? lock_is_held_type+0xdf/0x130 [ 14.485474] ? find_held_lock+0x2d/0x90 [ 14.486046] ? __sys_sendmsg+0x41/0x70 [ 14.486587] __sys_sendmsg+0x41/0x70 [ 14.487105] ? intel_pmu_drain_pebs_core+0x350/0x350 [ 14.487822] do_syscall_64+0x34/0x80 [ 14.488345] entry_SYSCALL_64_after_hwframe+0x63/0xcd [...] The test scenario has the following flow: thread1 thread2 ----------- --------------- tcp_bpf_sendmsg tcp_bpf_send_verdict tcp_bpf_sendmsg_redir sock_close tcp_bpf_push_locked __sock_release tcp_bpf_push //inet_release do_tcp_sendpages sock->ops->release sk_stream_wait_memory // tcp_close sk_wait_event sk->sk_prot->close release_sock(__sk); *** lock_sock(sk); __tcp_close sock_orphan(sk) sk->sk_wq = NULL release_sock **** lock_sock(__sk); remove_wait_queue(sk_sleep(sk), &wait); sk_sleep(sk) //NULL pointer dereference &rcu_dereference_raw(sk->sk_wq)->wait While waiting for memory in thread1, the socket is released with its wait queue because thread2 has closed it. This caused by tcp_bpf_send_verdict didn't increase the f_count of psock->sk_redir->sk_socket->file in thread1. We should check if SOCK_DEAD flag is set on wakeup in sk_stream_wait_memory before accessing the wait queue. CVE-2022-50409 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2022-50409.html CVE-2022-50409 https://bugzilla.suse.com/1247374 SUSE Bug 1247374 https://bugzilla.suse.com/1250392 SUSE Bug 1250392 https://bugzilla.suse.com/1250665 SUSE Bug 1250665 In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from htab_lock_bucket() to userspace In __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns -EBUSY, it will go to next bucket. Going to next bucket may not only skip the elements in current bucket silently, but also incur out-of-bound memory access or expose kernel memory to userspace if current bucket_cnt is greater than bucket_size or zero. Fixing it by stopping batch operation and returning -EBUSY when htab_lock_bucket() fails, and the application can retry or skip the busy batch as needed. CVE-2022-50490 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2022-50490.html CVE-2022-50490 https://bugzilla.suse.com/1251164 SUSE Bug 1251164 https://bugzilla.suse.com/1251165 SUSE Bug 1251165 In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show() The function lio_target_nacl_info_show() uses sprintf() in a loop to print details for every iSCSI connection in a session without checking for the buffer length. With enough iSCSI connections it's possible to overflow the buffer provided by configfs and corrupt the memory. This patch replaces sprintf() with sysfs_emit_at() that checks for buffer boundries. CVE-2023-53676 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2023-53676.html CVE-2023-53676 https://bugzilla.suse.com/1251786 SUSE Bug 1251786 https://bugzilla.suse.com/1251787 SUSE Bug 1251787 In the Linux kernel, the following vulnerability has been resolved: tls: stop recv() if initial process_rx_list gave us non-DATA If we have a non-DATA record on the rx_list and another record of the same type still on the queue, we will end up merging them: - process_rx_list copies the non-DATA record - we start the loop and process the first available record since it's of the same type - we break out of the loop since the record was not DATA Just check the record type and jump to the end in case process_rx_list did some work. CVE-2024-58239 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2024-58239.html CVE-2024-58239 https://bugzilla.suse.com/1248614 SUSE Bug 1248614 https://bugzilla.suse.com/1248615 SUSE Bug 1248615 In the Linux kernel, the following vulnerability has been resolved: rpl: Fix use-after-free in rpl_do_srh_inline(). Running lwt_dst_cache_ref_loop.sh in selftest with KASAN triggers the splat below [0]. rpl_do_srh_inline() fetches ipv6_hdr(skb) and accesses it after skb_cow_head(), which is illegal as the header could be freed then. Let's fix it by making oldhdr to a local struct instead of a pointer. [0]: [root@fedora net]# ./lwt_dst_cache_ref_loop.sh ... TEST: rpl (input) [ 57.631529] ================================================================== BUG: KASAN: slab-use-after-free in rpl_do_srh_inline.isra.0 (net/ipv6/rpl_iptunnel.c:174) Read of size 40 at addr ffff888122bf96d8 by task ping6/1543 CPU: 50 UID: 0 PID: 1543 Comm: ping6 Not tainted 6.16.0-rc5-01302-gfadd1e6231b1 #23 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <IRQ> dump_stack_lvl (lib/dump_stack.c:122) print_report (mm/kasan/report.c:409 mm/kasan/report.c:521) kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:636) kasan_check_range (mm/kasan/generic.c:175 (discriminator 1) mm/kasan/generic.c:189 (discriminator 1)) __asan_memmove (mm/kasan/shadow.c:94 (discriminator 2)) rpl_do_srh_inline.isra.0 (net/ipv6/rpl_iptunnel.c:174) rpl_input (net/ipv6/rpl_iptunnel.c:201 net/ipv6/rpl_iptunnel.c:282) lwtunnel_input (net/core/lwtunnel.c:459) ipv6_rcv (./include/net/dst.h:471 (discriminator 1) ./include/net/dst.h:469 (discriminator 1) net/ipv6/ip6_input.c:79 (discriminator 1) ./include/linux/netfilter.h:317 (discriminator 1) ./include/linux/netfilter.h:311 (discriminator 1) net/ipv6/ip6_input.c:311 (discriminator 1)) __netif_receive_skb_one_core (net/core/dev.c:5967) process_backlog (./include/linux/rcupdate.h:869 net/core/dev.c:6440) __napi_poll.constprop.0 (net/core/dev.c:7452) net_rx_action (net/core/dev.c:7518 net/core/dev.c:7643) handle_softirqs (kernel/softirq.c:579) do_softirq (kernel/softirq.c:480 (discriminator 20)) </IRQ> <TASK> __local_bh_enable_ip (kernel/softirq.c:407) __dev_queue_xmit (net/core/dev.c:4740) ip6_finish_output2 (./include/linux/netdevice.h:3358 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) ip6_output (./include/linux/netfilter.h:306 net/ipv6/ip6_output.c:248) ip6_send_skb (net/ipv6/ip6_output.c:1983) rawv6_sendmsg (net/ipv6/raw.c:588 net/ipv6/raw.c:918) __sys_sendto (net/socket.c:714 (discriminator 1) net/socket.c:729 (discriminator 1) net/socket.c:2228 (discriminator 1)) __x64_sys_sendto (net/socket.c:2231) do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) RIP: 0033:0x7f68cffb2a06 Code: 5d e8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 75 19 83 e2 39 83 fa 08 75 11 e8 26 ff ff ff 66 0f 1f 44 00 00 48 8b 45 10 0f 05 <48> 8b 5d f8 c9 c3 0f 1f 40 00 f3 0f 1e fa 55 48 89 e5 48 83 ec 08 RSP: 002b:00007ffefb7c53d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000564cd69f10a0 RCX: 00007f68cffb2a06 RDX: 0000000000000040 RSI: 0000564cd69f10a4 RDI: 0000000000000003 RBP: 00007ffefb7c53f0 R08: 0000564cd6a032ac R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000202 R12: 0000564cd69f10a4 R13: 0000000000000040 R14: 00007ffefb7c66e0 R15: 0000564cd69f10a0 </TASK> Allocated by task 1543: kasan_save_stack (mm/kasan/common.c:48) kasan_save_track (mm/kasan/common.c:60 (discriminator 1) mm/kasan/common.c:69 (discriminator 1)) __kasan_slab_alloc (mm/kasan/common.c:319 mm/kasan/common.c:345) kmem_cache_alloc_node_noprof (./include/linux/kasan.h:250 mm/slub.c:4148 mm/slub.c:4197 mm/slub.c:4249) kmalloc_reserve (net/core/skbuff.c:581 (discriminator 88)) __alloc_skb (net/core/skbuff.c:669) __ip6_append_data (net/ipv6/ip6_output.c:1672 (discriminator 1)) ip6_ ---truncated--- CVE-2025-38476 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2025-38476.html CVE-2025-38476 https://bugzilla.suse.com/1247317 SUSE Bug 1247317 https://bugzilla.suse.com/1251203 SUSE Bug 1251203 In the Linux kernel, the following vulnerability has been resolved: ipv6: reject malicious packets in ipv6_gso_segment() syzbot was able to craft a packet with very long IPv6 extension headers leading to an overflow of skb->transport_header. This 16bit field has a limited range. Add skb_reset_transport_header_careful() helper and use it from ipv6_gso_segment() WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 skb_reset_transport_header include/linux/skbuff.h:3032 [inline] WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Modules linked in: CPU: 0 UID: 0 PID: 5871 Comm: syz-executor211 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [inline] RIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Call Trace: <TASK> skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 nsh_gso_segment+0x54a/0xe10 net/nsh/nsh.c:110 skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 __skb_gso_segment+0x342/0x510 net/core/gso.c:124 skb_gso_segment include/net/gso.h:83 [inline] validate_xmit_skb+0x857/0x11b0 net/core/dev.c:3950 validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4000 sch_direct_xmit+0xd3/0x4b0 net/sched/sch_generic.c:329 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4679 CVE-2025-38572 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2025-38572.html CVE-2025-38572 https://bugzilla.suse.com/1248399 SUSE Bug 1248399 https://bugzilla.suse.com/1248400 SUSE Bug 1248400 In the Linux kernel, the following vulnerability has been resolved: bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls When sending plaintext data, we initially calculated the corresponding ciphertext length. However, if we later reduced the plaintext data length via socket policy, we failed to recalculate the ciphertext length. This results in transmitting buffers containing uninitialized data during ciphertext transmission. This causes uninitialized bytes to be appended after a complete "Application Data" packet, leading to errors on the receiving end when parsing TLS record. CVE-2025-38608 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2025-38608.html CVE-2025-38608 https://bugzilla.suse.com/1248338 SUSE Bug 1248338 https://bugzilla.suse.com/1248670 SUSE Bug 1248670 In the Linux kernel, the following vulnerability has been resolved: sctp: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this. CVE-2025-40204 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-8-150500.2.1 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/2026/suse-su-20260186-1/ https://www.suse.com/security/cve/CVE-2025-40204.html CVE-2025-40204 https://bugzilla.suse.com/1253436 SUSE Bug 1253436 https://bugzilla.suse.com/1253437 SUSE Bug 1253437