BELL-CVE-2025-21876

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CVE-2025-21876

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix suspicious RCU usage Commit "iommu/vt-d: Allocate DMAR fault interrupts locally" moved the call to enabledrhdfaulthandling to a code path that does not hold any lock while traversing the drhd list. Fix it by...

CVE-2025-21876

CVE-2025-21876 - Linux kernel iommu/vt-d : The issue arises from a code path in enable_drhd_fault_handling() that traverses the DMAR drhd list without holding the required dmar_global_lock, triggering a “suspicious RCU usage” warning. The fix (commit d74169ceb0d2) ensures dmar_global_lock is held...