Security update for the Linux Kernel (Live Patch 29 for SLE 15 SP5) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:03403-1 Final 1 1 2025-09-27T22:04:02Z current 2025-09-27T22:04:02Z 2025-09-27T22:04:02Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 29 for SLE 15 SP5) This update for the Linux Kernel 5.14.21-150500_55_116 fixes several issues. The following security issues were fixed: - CVE-2025-38498: do_change_type(): refuse to operate on unmounted/not ours mounts (bsc#1247499). - CVE-2025-38555: usb: gadget : fix use-after-free in composite_dev_cleanup() (bsc#1248298). - CVE-2025-21701: net: avoid race between device unregistration and ethnl ops (bsc#1245805). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2025-3403,SUSE-SLE-Module-Live-Patching-15-SP5-2025-3403 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-202503403-1/ Link for SUSE-SU-2025:03403-1 https://lists.suse.com/pipermail/sle-updates/2025-September/041956.html E-Mail link for SUSE-SU-2025:03403-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1245805 SUSE Bug 1245805 https://bugzilla.suse.com/1247499 SUSE Bug 1247499 https://bugzilla.suse.com/1248298 SUSE Bug 1248298 https://www.suse.com/security/cve/CVE-2025-21701/ SUSE CVE CVE-2025-21701 page https://www.suse.com/security/cve/CVE-2025-38498/ SUSE CVE CVE-2025-38498 page https://www.suse.com/security/cve/CVE-2025-38555/ SUSE CVE CVE-2025-38555 page SUSE Linux Enterprise Live Patching 15 SP5 kernel-livepatch-5_14_21-150500_55_116-default-3-150500.2.1 kernel-livepatch-5_14_21-150500_55_116-default-3-150500.2.1 as a component of SUSE Linux Enterprise Live Patching 15 SP5 In the Linux kernel, the following vulnerability has been resolved: net: avoid race between device unregistration and ethnl ops The following trace can be seen if a device is being unregistered while its number of channels are being modified. DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: CPU: 3 PID: 3754 at kernel/locking/mutex.c:564 __mutex_lock+0xc8a/0x1120 CPU: 3 UID: 0 PID: 3754 Comm: ethtool Not tainted 6.13.0-rc6+ #771 RIP: 0010:__mutex_lock+0xc8a/0x1120 Call Trace: <TASK> ethtool_check_max_channel+0x1ea/0x880 ethnl_set_channels+0x3c3/0xb10 ethnl_default_set_doit+0x306/0x650 genl_family_rcv_msg_doit+0x1e3/0x2c0 genl_rcv_msg+0x432/0x6f0 netlink_rcv_skb+0x13d/0x3b0 genl_rcv+0x28/0x40 netlink_unicast+0x42e/0x720 netlink_sendmsg+0x765/0xc20 __sys_sendto+0x3ac/0x420 __x64_sys_sendto+0xe0/0x1c0 do_syscall_64+0x95/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e This is because unregister_netdevice_many_notify might run before the rtnl lock section of ethnl operations, eg. set_channels in the above example. In this example the rss lock would be destroyed by the device unregistration path before being used again, but in general running ethnl operations while dismantle has started is not a good idea. Fix this by denying any operation on devices being unregistered. A check was already there in ethnl_ops_begin, but not wide enough. Note that the same issue cannot be seen on the ioctl version (__dev_ethtool) because the device reference is retrieved from within the rtnl lock section there. Once dismantle started, the net device is unlisted and no reference will be found. CVE-2025-21701 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-3-150500.2.1 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/2025/suse-su-202503403-1/ https://www.suse.com/security/cve/CVE-2025-21701.html CVE-2025-21701 https://bugzilla.suse.com/1237164 SUSE Bug 1237164 https://bugzilla.suse.com/1245805 SUSE Bug 1245805 In the Linux kernel, the following vulnerability has been resolved: do_change_type(): refuse to operate on unmounted/not ours mounts Ensure that propagation settings can only be changed for mounts located in the caller's mount namespace. This change aligns permission checking with the rest of mount(2). CVE-2025-38498 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-3-150500.2.1 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/2025/suse-su-202503403-1/ https://www.suse.com/security/cve/CVE-2025-38498.html CVE-2025-38498 https://bugzilla.suse.com/1247374 SUSE Bug 1247374 https://bugzilla.suse.com/1247499 SUSE Bug 1247499 In the Linux kernel, the following vulnerability has been resolved: usb: gadget : fix use-after-free in composite_dev_cleanup() 1. In func configfs_composite_bind() -> composite_os_desc_req_prepare(): if kmalloc fails, the pointer cdev->os_desc_req will be freed but not set to NULL. Then it will return a failure to the upper-level function. 2. in func configfs_composite_bind() -> composite_dev_cleanup(): it will checks whether cdev->os_desc_req is NULL. If it is not NULL, it will attempt to use it.This will lead to a use-after-free issue. BUG: KASAN: use-after-free in composite_dev_cleanup+0xf4/0x2c0 Read of size 8 at addr 0000004827837a00 by task init/1 CPU: 10 PID: 1 Comm: init Tainted: G O 5.10.97-oh #1 kasan_report+0x188/0x1cc __asan_load8+0xb4/0xbc composite_dev_cleanup+0xf4/0x2c0 configfs_composite_bind+0x210/0x7ac udc_bind_to_driver+0xb4/0x1ec usb_gadget_probe_driver+0xec/0x21c gadget_dev_desc_UDC_store+0x264/0x27c CVE-2025-38555 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_116-default-3-150500.2.1 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/2025/suse-su-202503403-1/ https://www.suse.com/security/cve/CVE-2025-38555.html CVE-2025-38555 https://bugzilla.suse.com/1248297 SUSE Bug 1248297 https://bugzilla.suse.com/1248298 SUSE Bug 1248298