CVE-2026-68424 mtd: virt_concat: fix use-after-free in mtd_virt_concat_destroy_joins()

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/mtd/mtd_virt_concat.c"
    ],
    "versions": [
      {
        "version": "43db6366fc2de02050e66389f5628d3fdc9af10a",
        "lessThan": "4d91d783f93430c0efa834daff6640c07d87ebbc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "43db6366fc2de02050e66389f5628d3fdc9af10a",
        "lessThan": "75c0c09541b49daa08fddbc2c18c2232f4eab7d8",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/mtd/mtd_virt_concat.c"
    ],
    "versions": [
      {
        "version": "7.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "7.1",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.6",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc4",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]