{
  "cveId": "CVE-2026-46022",
  "url": "https://patchblox.com/security/cve/CVE-2026-46022",
  "summary": "CVE-2026-46022 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-46022, released May 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()  ibmasm_handle_mouse_interrupt() performs an out-of-bounds MMIO read when the queue reader or writer index from hardware exceeds REMOTE_QUEUE_SIZE (60).  A compromised service processor can trigger this by writing an out-of-range value to the reader or writer MMIO register before asserting an interrupt. Since writer is re-read from hardware on every loop iteration, it can also be set to an out-of-range value after the loop has already started.  The root cause is that get_queue_reader() and get_queue_writer() return raw readl() values that are passed directly into get_queue_entry(), which computes:    queue_begin \u002B reader * sizeof(struct remote_input)  with no bounds check. This unchecked MMIO address is then passed to memcpy_fromio(), reading 8 bytes from unintended device registers. For sufficiently large values the address falls outside the PCI BAR mapping entirely, triggering a machine check exception.  Fix by checking both indices against REMOTE_QUEUE_SIZE at the top of the loop body, before any call to get_queue_entry(). On an out-of-range value, reset the reader register to 0 via set_queue_reader() before breaking, so that normal queue operation can resume if the corrupted hardware state is transient.",
  "published": "2026-05-27T14:17:20Z",
  "severity": "Moderate",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00148,
  "epssPercentile": 0.04024,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46022",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.176-1",
      "fix": "DEBIAN-CVE-2026-46022",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-46022",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.86-1",
      "fix": "DEBIAN-CVE-2026-46022",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-46022",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.4-1",
      "fix": "DEBIAN-CVE-2026-46022",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-46022",
      "released": "2026-05-27T17:38:13Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}