Threats tagged 'ghsa-23g4-q58q-5pxc'

CVE-2025-21876 addresses a vulnerability in the Linux kernel's iommu/vt-d subsystem related to improper use of Read-Copy-Update (RCU) synchronization. A code change moved a call to enable_drhd_fault_handling() to a path without holding the necessary dmar_global_lock, causing suspicious RCU usage warnings and potential stability issues. The fix ensures the dmar_global_lock is held when traversing the drhd list to prevent these warnings and avoid deadlocks.