CVE-2026-68445 drm/vc4: Prevent shader BO mappings from becoming writable

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/gpu/drm/vc4/vc4_bo.c"
    ],
    "versions": [
      {
        "version": "463873d5701427f2964a0b4b72c45f1f14b6df87",
        "lessThan": "9f0ee411fc2d76333d6087c5862ffa907cf7a175",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "463873d5701427f2964a0b4b72c45f1f14b6df87",
        "lessThan": "019e6ad247f7fd038d2e009789f6d9bfcccb1ae7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "463873d5701427f2964a0b4b72c45f1f14b6df87",
        "lessThan": "6deaa317201851c644c431b57682e54d06b35838",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "463873d5701427f2964a0b4b72c45f1f14b6df87",
        "lessThan": "fe168ef1d232d734d9998fd74822e2e20930dfff",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "463873d5701427f2964a0b4b72c45f1f14b6df87",
        "lessThan": "0c9e6367639548307d3f578f6943ce72c9d39087",
        "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/gpu/drm/vc4/vc4_bo.c"
    ],
    "versions": [
      {
        "version": "4.5",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.5",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.148",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.101",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.42",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.6",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc5",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]