dmaengine: idxd: Prevent use after free on completion memory

{
  "id": "f60d731d641dda097f863bbd8a64fc044ded3229b83ab36058ece754c1c3a640",
  "url": "https://osv.dev/vulnerability/CVE-2022-48867",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dmaengine: idxd: Prevent use after free on completion memory",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Prevent use after free on completion memory On driver unload any pending descriptors are flushed at the time the interrupt is freed: idxd_dmaengine_drv_remove() -> drv_disable_wq() -> idxd_wq_free_irq() -> idxd_flush_pending_descs(). If there are any descriptors present that need to be flushed this flow triggers a \"not present\" page fault as below: BUG: unable to handle page fault for address: ff391c97c70c9040 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page The address that triggers the fault is the address of the descriptor that was freed moments earlier via: drv_disable_wq()->idxd_wq_free_resources() Fix the use after free by freeing the descriptors after any possible usage. This is done after idxd_wq_reset() to ensure that the memory remains accessible during possible completion writes by the device.",
    "evidence": "osv:CVE-2022-48867",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-48867",
      "aliases": [
        "CVE-2022-48867"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "63c14ae6c161dec8ff3be49277edc75a769e054a"
                },
                {
                  "fixed": "b9e8e3fcfec625fc1c2f68f684448aeeb882625b"
                },
                {
                  "fixed": "1beeec45f9ac31eba52478379f70a5fa9c2ad005"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48867.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.19.0"
                },
                {
                  "fixed": "6.1.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48867.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.248341132Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1beeec45f9ac31eba52478379f70a5fa9c2ad005",
        "https://git.kernel.org/stable/c/b9e8e3fcfec625fc1c2f68f684448aeeb882625b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48867.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-48867",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48867.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-48867",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490356,
  "published_at": "2024-08-21T06:09:57.153+00:00"
}