CVE-2026-43253

HIGH EPSS 25.9%
Published May 6, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
25.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥4.9  –  <6.6.128
linuxlinux_kernel*≥6.7  –  <6.12.75
linuxlinux_kernel*≥6.13  –  <6.18.16
linuxlinux_kernel*≥6.19  –  <6.19.6

References 5

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

Remediation

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