{
  "cveId": "CVE-2026-53164",
  "url": "https://patchblox.com/security/cve/CVE-2026-53164",
  "summary": "CVE-2026-53164 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-53164, released June 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  iommu/dma: Do not try to iommu_map a 0 length re...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  iommu/dma: Do not try to iommu_map a 0 length region in swiotlb  iommu_dma_iova_link_swiotlb() processes a mapping that is unaligned in three parts, the head, middle and trailer. If the middle is empty because there are no aligned pages it will call down to iommu_map() with a 0 size which the iommupt implementation will fail as illegal.  It then tries to do an error unwind and starts from the wrong spot corrupting the mapping so the eventual destruction triggers a WARN_ON.  Check for 0 length and avoid mapping and use offset not 0 as the starting point to unlink.  This is frequently triggered by using some kinds of thunderbolt NVMe drives that trigger forced SWIOTLB for unaligned memory. NVMe seems to pass in oddly aligned buffers for the passthrough commands from smartctl that hit this condition.",
  "published": "2026-06-25T09:16:33Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0016,
  "epssPercentile": 0.05207,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.36-69.134",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.13-1",
      "fix": "DEBIAN-CVE-2026-53164",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53164",
      "released": "2026-06-28T17:47:07Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.36-69.134.amzn2023",
      "fix": "ALAS2023-2026-1925",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1925",
      "released": "2026-07-06T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}