Linux Kernel EUVD-2026-24771

The vulnerability resides in the dmaengine idxd (Intel Data Accelerators) driver subsystem, specifically in the idxd_wq_disable_cleanup() function invoked during workqueue reset operations. The idxd driver manages DMA operations for Intel accelerator hardware. The bug occurs because idxd_wq_disable_cleanup() sets the workqueue type field to NONE before releasing allocated resources, signaling to other driver code that the workqueue is empty and fully cleaned. Subsequent resource release attempts then fail because the type-to-NONE transition causes other code paths to skip cleanup, leading to orphaned memory allocations. This is a classic use-after-free prevention failure (CWE-401: Missing Release of Memory after Effective Lifetime). The fix requires reordering the type assignment to occur only after all resources have been explicitly freed, ensuring proper cleanup sequencing. CPE data indicates affectation across the entire Linux kernel product line with specific versions 5.8 through 7.0-rc1 confirmed vulnerable.