CVE-2026-43253
iommu/amd: move wait_on_sem() out of spinlock
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 6, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f2f65b28d802a667119147444ec2ae33eebf9a58 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 715c263119fd1b918a9fcbd8a36ea5b604a46324 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e15768e68820142077bbca402d8e902f64ade1b0 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 496269d12072ecb219826485bdbec70c92a8eef5 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d2a0cac10597068567d336e85fa3cbdbe8ca62bf
Linux / Linux
All versions affected References
git.kernel.org: https://git.kernel.org/stable/c/f2f65b28d802a667119147444ec2ae33eebf9a58 git.kernel.org: https://git.kernel.org/stable/c/715c263119fd1b918a9fcbd8a36ea5b604a46324 git.kernel.org: https://git.kernel.org/stable/c/e15768e68820142077bbca402d8e902f64ade1b0 git.kernel.org: https://git.kernel.org/stable/c/496269d12072ecb219826485bdbec70c92a8eef5 git.kernel.org: https://git.kernel.org/stable/c/d2a0cac10597068567d336e85fa3cbdbe8ca62bf