{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "278d72ae8803ffcd16070c95fe1d53f4466dc741"
            },
            {
              "fixed": "6f6ecc9153df176e956d0664b56f93080b0a45f0"
            },
            {
              "fixed": "bac8643486f854dd53af9b23aea7dbbd9b7c1865"
            },
            {
              "fixed": "f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab"
            },
            {
              "fixed": "fc7e9a74e32299d7e93e178ca482a0b59ef1595b"
            },
            {
              "fixed": "07c4f18b303106e6b24492c12b95d48a4b985841"
            },
            {
              "fixed": "22a16d3eafee92a165c756081587c95850127107"
            },
            {
              "fixed": "1ca75f6b74ec7f685464e5745ecfcf3a76d284e9"
            },
            {
              "fixed": "4b6e6ead556734bdc14024c5f837132b1e7a4b84"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.13"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.86"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.27"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46022.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()\n\nibmasm_handle_mouse_interrupt() performs an out-of-bounds MMIO read\nwhen the queue reader or writer index from hardware exceeds\nREMOTE_QUEUE_SIZE (60).\n\nA compromised service processor can trigger this by writing an\nout-of-range value to the reader or writer MMIO register before\nasserting an interrupt. Since writer is re-read from hardware on\nevery loop iteration, it can also be set to an out-of-range value\nafter the loop has already started.\n\nThe root cause is that get_queue_reader() and get_queue_writer() return\nraw readl() values that are passed directly into get_queue_entry(),\nwhich computes:\n\n  queue_begin + reader * sizeof(struct remote_input)\n\nwith no bounds check. This unchecked MMIO address is then passed to\nmemcpy_fromio(), reading 8 bytes from unintended device registers.\nFor sufficiently large values the address falls outside the PCI BAR\nmapping entirely, triggering a machine check exception.\n\nFix by checking both indices against REMOTE_QUEUE_SIZE at the top of\nthe loop body, before any call to get_queue_entry(). On an out-of-range\nvalue, reset the reader register to 0 via set_queue_reader() before\nbreaking, so that normal queue operation can resume if the corrupted\nhardware state is transient.",
  "id": "CVE-2026-46022",
  "modified": "2026-07-15T01:48:58.292939280Z",
  "published": "2026-05-27T12:56:26.791Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07c4f18b303106e6b24492c12b95d48a4b985841"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ca75f6b74ec7f685464e5745ecfcf3a76d284e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22a16d3eafee92a165c756081587c95850127107"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b6e6ead556734bdc14024c5f837132b1e7a4b84"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f6ecc9153df176e956d0664b56f93080b0a45f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bac8643486f854dd53af9b23aea7dbbd9b7c1865"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7e5b4eefd7be3e09f8bd5fee63ed478fd7446ab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc7e9a74e32299d7e93e178ca482a0b59ef1595b"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46022.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46022"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "misc: ibmasm: fix OOB MMIO read in ibmasm_handle_mouse_interrupt()"
}