🛡️ CVE-2026-43253
🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-667 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-667
Public Exploit ✅ No
Source NVD
Published 2026-05-06
Updated 2026-06-02
Modified 2026-05-11

Affected Packages

Software From version Fixed in
linux-kernel 6.19 6.19.6
unknown — —

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