{"schema_version":"1.9.0","id":"CVE-2025-37993","published":"2025-05-29T13:15:52.811Z","modified":"2026-08-12T03:51:13.242622599Z","summary":"can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe\n\nThe spin lock tx_handling_spinlock in struct m_can_classdev is not\nbeing initialized. This leads the following spinlock bad magic\ncomplaint from the kernel, eg. when trying to send CAN frames with\ncansend from can-utils:\n\n| BUG: spinlock bad magic on CPU#0, cansend/95\n|  lock: 0xff60000002ec1010, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0\n| CPU: 0 UID: 0 PID: 95 Comm: cansend Not tainted 6.15.0-rc3-00032-ga79be02bba5c #5 NONE\n| Hardware name: MachineWare SIM-V (DT)\n| Call Trace:\n| [<ffffffff800133e0>] dump_backtrace+0x1c/0x24\n| [<ffffffff800022f2>] show_stack+0x28/0x34\n| [<ffffffff8000de3e>] dump_stack_lvl+0x4a/0x68\n| [<ffffffff8000de70>] dump_stack+0x14/0x1c\n| [<ffffffff80003134>] spin_dump+0x62/0x6e\n| [<ffffffff800883ba>] do_raw_spin_lock+0xd0/0x142\n| [<ffffffff807a6fcc>] _raw_spin_lock_irqsave+0x20/0x2c\n| [<ffffffff80536dba>] m_can_start_xmit+0x90/0x34a\n| [<ffffffff806148b0>] dev_hard_start_xmit+0xa6/0xee\n| [<ffffffff8065b730>] sch_direct_xmit+0x114/0x292\n| [<ffffffff80614e2a>] __dev_queue_xmit+0x3b0/0xaa8\n| [<ffffffff8073b8fa>] can_send+0xc6/0x242\n| [<ffffffff8073d1c0>] raw_sendmsg+0x1a8/0x36c\n| [<ffffffff805ebf06>] sock_write_iter+0x9a/0xee\n| [<ffffffff801d06ea>] vfs_write+0x184/0x3a6\n| [<ffffffff801d0a88>] ksys_write+0xa0/0xc0\n| [<ffffffff801d0abc>] __riscv_sys_write+0x14/0x1c\n| [<ffffffff8079ebf8>] do_trap_ecall_u+0x168/0x212\n| [<ffffffff807a830a>] handle_exception+0x146/0x152\n\nInitializing the spin lock in m_can_class_allocate_dev solves that\nproblem.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1fa80e23c15051edc1c594270517de3517ded798"},{"fixed":"2ecce25ea296f328d79070ee36229a15aeeb7aca"},{"fixed":"7d5379cfecfdd665e4206bc4f19824656388779f"},{"fixed":"dcaeeb8ae84c5506ebc574732838264f3887738c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37993.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.29"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.14.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37993.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2ecce25ea296f328d79070ee36229a15aeeb7aca"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d5379cfecfdd665e4206bc4f19824656388779f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dcaeeb8ae84c5506ebc574732838264f3887738c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37993.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-37993"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37993.json"}}