bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove()

{
  "id": "098092384f2c6219e70cc57da11d3b456c5d167935f66bcce4b5dedc134c960f",
  "url": "https://osv.dev/vulnerability/CVE-2022-49711",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove() In fsl_mc_bus_remove(), mc->root_mc_bus_dev->mc_io is passed to fsl_destroy_mc_io(). However, mc->root_mc_bus_dev is already freed in fsl_mc_device_remove(). Then reference to mc->root_mc_bus_dev->mc_io triggers KASAN use-after-free. To avoid the use-after-free, keep the reference to mc->root_mc_bus_dev->mc_io in a local variable and pass to fsl_destroy_mc_io(). This patch needs rework to apply to kernels older than v5.15.",
    "evidence": "osv:CVE-2022-49711",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.248",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.49",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.18.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-49711",
      "aliases": [
        "CVE-2022-49711"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f93627146f0e371093966ed3d44c065aa077cfb1"
                },
                {
                  "fixed": "720ab105df7bf3eee62d2bddd41526b29d07d045"
                },
                {
                  "fixed": "ccd1751092341ac120a961835211f9f2e3735963"
                },
                {
                  "fixed": "161b68b0a728377aaa10a8e14c70e7734f3c9ff7"
                },
                {
                  "fixed": "928ea98252ad75118950941683893cf904541da9"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49711.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.8.0"
                },
                {
                  "fixed": "5.10.248"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.49"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.18.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49711.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.363101284Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/161b68b0a728377aaa10a8e14c70e7734f3c9ff7",
        "https://git.kernel.org/stable/c/720ab105df7bf3eee62d2bddd41526b29d07d045",
        "https://git.kernel.org/stable/c/928ea98252ad75118950941683893cf904541da9",
        "https://git.kernel.org/stable/c/ccd1751092341ac120a961835211f9f2e3735963",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49711.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49711",
        "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/2022/49xxx/CVE-2022-49711.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49711",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489423,
  "published_at": "2025-02-26T02:24:28.224+00:00"
}