CVE-2026-64162
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init() In idpf_ptp_init(), read_dev_clk_lock is initialized after ptp_schedule_worker() had already been called (and after idpf_ptp_settime64() could reach the lock). The PTP aux worker fires immediately upon scheduling and can call into idpf_ptp_read_src_clk_reg_direct(), which takes spin_lock(&ptp->read_dev_clk_lock) on an uninitialized lock, triggering the lockdep "non-static key" warning: [12973.796587] idpf 0000:83:00.0: Device HW Reset initiated [12974.094507] INFO: trying to register non-static key. ... [12974.097208] Call Trace: [12974.097213] <TASK> [12974.097218] dump_stack_lvl+0x93/0xe0 [12974.097234] register_lock_class+0x4c4/0x4e0 [12974.097249] ? __lock_acquire+0x427/0x2290 [12974.097259] __lock_acquire+0x98/0x2290 [12974.097272] lock_acquire+0xc6/0x310 [12974.097281] ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf] [12974.097311] ? lockdep_hardirqs_on_prepare+0xde/0x190 [12974.097318] ? finish_task_switch.isra.0+0xd2/0x350 [12974.097330] ? __pfx_ptp_aux_kworker+0x10/0x10 [ptp] [12974.097343] _raw_spin_lock+0x30/0x40 [12974.097353] ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf] [12974.097373] idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf] [12974.097391] ? kthread_worker_fn+0x88/0x3d0 [12974.097404] ? kthread_worker_fn+0x4e/0x3d0 [12974.097411] idpf_ptp_update_cached_phctime+0x26/0x120 [idpf] [12974.097428] ? _raw_spin_unlock_irq+0x28/0x50 [12974.097436] idpf_ptp_do_aux_work+0x15/0x20 [idpf] [12974.097454] ptp_aux_kworker+0x20/0x40 [ptp] [12974.097464] kthread_worker_fn+0xd5/0x3d0 [12974.097474] ? __pfx_kthread_worker_fn+0x10/0x10 [12974.097482] kthread+0xf4/0x130 [12974.097489] ? __pfx_kthread+0x10/0x10 [12974.097498] ret_from_fork+0x32c/0x410 [12974.097512] ? __pfx_kthread+0x10/0x10 [12974.097519] ret_from_fork_asm+0x1a/0x30 [12974.097540] </TASK> Move the call to spin_lock_init() up a bit to make sure read_dev_clk_lock is not touched before it's been initialized.
View original CVE JSON
{
"id": "CVE-2026-64162",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-07-19T16:17:58.213",
"lastModified": "2026-10-19T21:17:25.880",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
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{
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"affectedData": [
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"programFiles": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
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"id": "CVE-2026-64162",
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