{"id":"CVE-2025-40164","summary":"usbnet: Fix using smp_processor_id() in preemptible code warnings","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: Fix using smp_processor_id() in preemptible code warnings\n\nSyzbot reported the following warning:\n\nBUG: using smp_processor_id() in preemptible [00000000] code: dhcpcd/2879\ncaller is usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331\nCPU: 1 UID: 0 PID: 2879 Comm: dhcpcd Not tainted 6.15.0-rc4-syzkaller-00098-g615dca38c2ea #0 PREEMPT(voluntary)\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120\n check_preemption_disabled+0xd0/0xe0 lib/smp_processor_id.c:49\n usbnet_skb_return+0x74/0x490 drivers/net/usb/usbnet.c:331\n usbnet_resume_rx+0x4b/0x170 drivers/net/usb/usbnet.c:708\n usbnet_change_mtu+0x1be/0x220 drivers/net/usb/usbnet.c:417\n __dev_set_mtu net/core/dev.c:9443 [inline]\n netif_set_mtu_ext+0x369/0x5c0 net/core/dev.c:9496\n netif_set_mtu+0xb0/0x160 net/core/dev.c:9520\n dev_set_mtu+0xae/0x170 net/core/dev_api.c:247\n dev_ifsioc+0xa31/0x18d0 net/core/dev_ioctl.c:572\n dev_ioctl+0x223/0x10e0 net/core/dev_ioctl.c:821\n sock_do_ioctl+0x19d/0x280 net/socket.c:1204\n sock_ioctl+0x42f/0x6a0 net/socket.c:1311\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:906 [inline]\n __se_sys_ioctl fs/ioctl.c:892 [inline]\n __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFor historical and portability reasons, the netif_rx() is usually\nrun in the softirq or interrupt context, this commit therefore add\nlocal_bh_disable/enable() protection in the usbnet_resume_rx().","modified":"2026-03-20T12:43:12.244489Z","published":"2025-11-12T10:26:23.482Z","related":["SUSE-SU-2025:4393-1","SUSE-SU-2025:4422-1","SUSE-SU-2025:4505-1","SUSE-SU-2025:4516-1","SUSE-SU-2025:4517-1","SUSE-SU-2025:4521-1","SUSE-SU-2026:0316-1","SUSE-SU-2026:20012-1","SUSE-SU-2026:20015-1","SUSE-SU-2026:20021-1","SUSE-SU-2026:20039-1","SUSE-SU-2026:20059-1","SUSE-SU-2026:20473-1","SUSE-SU-2026:20496-1","openSUSE-SU-2025:20172-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40164.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0134c7bff14bd50314a4f92b182850ddfc38e255"},{"type":"WEB","url":"https://git.kernel.org/stable/c/17fbad93879e87a334062882b45fa727ba1b3dd7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/327cd4b68b4398b6c24f10eb2b2533ffbfc10185"},{"type":"WEB","url":"https://git.kernel.org/stable/c/65d04291adf7c59338f87aab9c6fe0bfa9993e64"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d1944bab8e0c1511f0cbf364aa06547735bb0ddb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f45fffae5e2549bd0a4670cc52a15ad54c9f121e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40164.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40164"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"43daa96b166c3cf5ff30dfac0c5efa2620e4beab"},{"fixed":"65d04291adf7c59338f87aab9c6fe0bfa9993e64"},{"fixed":"f45fffae5e2549bd0a4670cc52a15ad54c9f121e"},{"fixed":"17fbad93879e87a334062882b45fa727ba1b3dd7"},{"fixed":"d1944bab8e0c1511f0cbf364aa06547735bb0ddb"},{"fixed":"0134c7bff14bd50314a4f92b182850ddfc38e255"},{"fixed":"327cd4b68b4398b6c24f10eb2b2533ffbfc10185"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40164.json"}}],"schema_version":"1.7.5"}