{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43253",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-43253"
  ],
  "published": "2026-05-06T11:29:17Z",
  "summary": "iommu/amd: move wait_on_sem() out of spinlock",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: move wait_on_sem() out of spinlock\n\nWith iommu.strict=1, the existing completion wait path can cause soft\nlockups under stressed environment, as wait_on_sem() busy-waits under the\nspinlock with interrupts disabled.\n\nMove the completion wait in iommu_completion_wait() out of the spinlock.\nwait_on_sem() only polls the hardware-updated cmd_sem and does not require\niommu->lock, so holding the lock during the busy wait unnecessarily\nincreases contention and extends the time with interrupts disabled.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43253"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f2f65b28d802a667119147444ec2ae33eebf9a58"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/715c263119fd1b918a9fcbd8a36ea5b604a46324"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e15768e68820142077bbca402d8e902f64ade1b0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/496269d12072ecb219826485bdbec70c92a8eef5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d2a0cac10597068567d336e85fa3cbdbe8ca62bf"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z"
  }
}