CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 7.5. It affects Linux.
CVE
CVE-2026-43253
Severity
HIGH
CVSS
7.5
EPSS
0.34%
Linux
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: move wait_on_sem() out of spinlock With iommu.strict=1, the existing completion wait path can cause soft lockups under stressed environment, as wait_on_sem() busy-waits under the spinlock with interrupts disabled. Move the completion wait in iommu_completion_wait() out of the spinlock. wait_on_sem() only polls the hardware-updated cmd_sem and does not require iommu->lock, so holding the lock during the busy wait unnecessarily increases contention and extends the time with interrupts disabled.
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