{"cve":"CVE-2026-64162","nvd":{"published":"2026-07-19T16:17:58.213","modified":"2026-10-19T21:17:25.880","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()\n\nIn idpf_ptp_init(), read_dev_clk_lock is initialized after\nptp_schedule_worker() had already been called (and after\nidpf_ptp_settime64() could reach the lock). The PTP aux worker\nfires immediately upon scheduling and can call into\nidpf_ptp_read_src_clk_reg_direct(), which takes\nspin_lock(&ptp->read_dev_clk_lock) on an uninitialized lock, triggering\nthe lockdep \"non-static key\" warning:\n\n[12973.796587] idpf 0000:83:00.0: Device HW Reset initiated\n[12974.094507] INFO: trying to register non-static key.\n...\n[12974.097208] Call Trace:\n[12974.097213]  <TASK>\n[12974.097218]  dump_stack_lvl+0x93/0xe0\n[12974.097234]  register_lock_class+0x4c4/0x4e0\n[12974.097249]  ? __lock_acquire+0x427/0x2290\n[12974.097259]  __lock_acquire+0x98/0x2290\n[12974.097272]  lock_acquire+0xc6/0x310\n[12974.097281]  ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097311]  ? lockdep_hardirqs_on_prepare+0xde/0x190\n[12974.097318]  ? finish_task_switch.isra.0+0xd2/0x350\n[12974.097330]  ? __pfx_ptp_aux_kworker+0x10/0x10 [ptp]\n[12974.097343]  _raw_spin_lock+0x30/0x40\n[12974.097353]  ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097373]  idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097391]  ? kthread_worker_fn+0x88/0x3d0\n[12974.097404]  ? kthread_worker_fn+0x4e/0x3d0\n[12974.097411]  idpf_ptp_update_cached_phctime+0x26/0x120 [idpf]\n[12974.097428]  ? _raw_spin_unlock_irq+0x28/0x50\n[12974.097436]  idpf_ptp_do_aux_work+0x15/0x20 [idpf]\n[12974.097454]  ptp_aux_kworker+0x20/0x40 [ptp]\n[12974.097464]  kthread_worker_fn+0xd5/0x3d0\n[12974.097474]  ? __pfx_kthread_worker_fn+0x10/0x10\n[12974.097482]  kthread+0xf4/0x130\n[12974.097489]  ? __pfx_kthread+0x10/0x10\n[12974.097498]  ret_from_fork+0x32c/0x410\n[12974.097512]  ? __pfx_kthread+0x10/0x10\n[12974.097519]  ret_from_fork_asm+0x1a/0x30\n[12974.097540]  </TASK>\n\nMove the call to spin_lock_init() up a bit to make sure read_dev_clk_lock\nis not touched before it's been initialized.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-666"],"references":["https://git.kernel.org/stable/c/3122d70b7c0101d897fb795658a7b93f854935f2","https://git.kernel.org/stable/c/da4f76b6a84ede14a71282ef841768299ead0221","https://git.kernel.org/stable/c/eb5991d4c8ba2e8153dfcda3e66a9608377b7dce"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-64162","score":0.00435,"percentile":0.37492,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}