CVE-2026-43253

7.5 Élevée

Publiée le 06/05/2026 à 14:16 · Modifiée le 19/10/2026 à 22:18 · Modifiée · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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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Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.5 Élevée	416baaa9-dc9f-4396-8d5f-8c081fb06d67	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Faiblesses (CWE)

CWE-667
CWE-833

Références

https://git.kernel.org/stable/c/496269d12072ecb219826485bdbec70c92a8eef5 Patch
https://git.kernel.org/stable/c/715c263119fd1b918a9fcbd8a36ea5b604a46324 Patch
https://git.kernel.org/stable/c/d2a0cac10597068567d336e85fa3cbdbe8ca62bf Patch
https://git.kernel.org/stable/c/e15768e68820142077bbca402d8e902f64ade1b0 Patch
https://git.kernel.org/stable/c/f2f65b28d802a667119147444ec2ae33eebf9a58 Patch

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories