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.
References
Configurations
Configuration 1 (hide)
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History
11 May 2026, 18:40
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-667 | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/496269d12072ecb219826485bdbec70c92a8eef5 - Patch | |
| References | () https://git.kernel.org/stable/c/715c263119fd1b918a9fcbd8a36ea5b604a46324 - Patch | |
| References | () https://git.kernel.org/stable/c/d2a0cac10597068567d336e85fa3cbdbe8ca62bf - Patch | |
| References | () https://git.kernel.org/stable/c/e15768e68820142077bbca402d8e902f64ade1b0 - Patch | |
| References | () https://git.kernel.org/stable/c/f2f65b28d802a667119147444ec2ae33eebf9a58 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
08 May 2026, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
06 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-06 12:16
Updated : 2026-05-11 18:40
NVD link : CVE-2026-43253
Mitre link : CVE-2026-43253
CVE.ORG link : CVE-2026-43253
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking