{"cve":"CVE-2024-35991","nvd":{"published":"2024-05-20T10:15:13.333","modified":"2026-06-17T07:35:53.910","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Convert spinlock to mutex to lock evl workqueue\n\ndrain_workqueue() cannot be called safely in a spinlocked context due to\npossible task rescheduling. In the multi-task scenario, calling\nqueue_work() while drain_workqueue() will lead to a Call Trace as\npushing a work on a draining workqueue is not permitted in spinlocked\ncontext.\n    Call Trace:\n    <TASK>\n    ? __warn+0x7d/0x140\n    ? __queue_work+0x2b2/0x440\n    ? report_bug+0x1f8/0x200\n    ? handle_bug+0x3c/0x70\n    ? exc_invalid_op+0x18/0x70\n    ? asm_exc_invalid_op+0x1a/0x20\n    ? __queue_work+0x2b2/0x440\n    queue_work_on+0x28/0x30\n    idxd_misc_thread+0x303/0x5a0 [idxd]\n    ? __schedule+0x369/0xb40\n    ? __pfx_irq_thread_fn+0x10/0x10\n    ? irq_thread+0xbc/0x1b0\n    irq_thread_fn+0x21/0x70\n    irq_thread+0x102/0x1b0\n    ? preempt_count_add+0x74/0xa0\n    ? __pfx_irq_thread_dtor+0x10/0x10\n    ? __pfx_irq_thread+0x10/0x10\n    kthread+0x103/0x140\n    ? __pfx_kthread+0x10/0x10\n    ret_from_fork+0x31/0x50\n    ? __pfx_kthread+0x10/0x10\n    ret_from_fork_asm+0x1b/0x30\n    </TASK>\n\nThe current implementation uses a spinlock to protect event log workqueue\nand will lead to the Call Trace due to potential task rescheduling.\n\nTo address the locking issue, convert the spinlock to mutex, allowing\nthe drain_workqueue() to be called in a safe mutex-locked context.\n\nThis change ensures proper synchronization when accessing the event log\nworkqueue, preventing potential Call Trace and improving the overall\nrobustness of the code.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/758071a35d9f3ffd84ff12169d081412a2f5f098","https://git.kernel.org/stable/c/c9b732a9f73eadc638abdcf0a6d39bc7a0c1af5f","https://git.kernel.org/stable/c/d5638de827cff0fce77007e426ec0ffdedf68a44","https://git.kernel.org/stable/c/758071a35d9f3ffd84ff12169d081412a2f5f098","https://git.kernel.org/stable/c/c9b732a9f73eadc638abdcf0a6d39bc7a0c1af5f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2024-35991","score":0.00164,"percentile":0.05626,"date":"2026-11-01"},"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."]}