{"id":"CVE-2025-37993","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-37993","generatedAt":"2026-10-28T04:44:38.438Z","title":"In the Linux kernel, the following vulnerability has been resolved: can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe The spin lock tx_handling_spinlock in struct m_can_classdev is not being initialized.","description":"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.","published":"2025-05-29T14:15:36.000Z","lastModified":"2026-06-17T09:15:50.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":[],"affected":["linux/linux kernel"],"epss":{"score":0.00187,"percentile":0.08221,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.19%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/2ecce25ea296f328d79070ee36229a15aeeb7aca","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7d5379cfecfdd665e4206bc4f19824656388779f","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dcaeeb8ae84c5506ebc574732838264f3887738c","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-37993","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}