CVE-2026-23227 (GCVE-0-2026-23227)
Vulnerability from cvelistv5
Published
2026-02-18 14:53
Modified
2026-04-13 06:02
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free Exynos Virtual Display driver performs memory alloc/free operations without lock protection, which easily causes concurrency problem. For example, use-after-free can occur in race scenario like this: ``` CPU0 CPU1 CPU2 ---- ---- ---- vidi_connection_ioctl() if (vidi->connection) // true drm_edid = drm_edid_alloc(); // alloc drm_edid ... ctx->raw_edid = drm_edid; ... drm_mode_getconnector() drm_helper_probe_single_connector_modes() vidi_get_modes() if (ctx->raw_edid) // true drm_edid_dup(ctx->raw_edid); if (!drm_edid) // false ... vidi_connection_ioctl() if (vidi->connection) // false drm_edid_free(ctx->raw_edid); // free drm_edid ... drm_edid_alloc(drm_edid->edid) kmemdup(edid); // UAF!! ... ``` To prevent these vulns, at least in vidi_context, member variables related to memory alloc/free should be protected with ctx->lock.
References
Impacted products
Vendor Product Version
Linux Linux Version: d3b62dbfc7b9bb013926f56db79b60f6c18c392f
Version: d3b62dbfc7b9bb013926f56db79b60f6c18c392f
Version: d3b62dbfc7b9bb013926f56db79b60f6c18c392f
Version: d3b62dbfc7b9bb013926f56db79b60f6c18c392f
Version: d3b62dbfc7b9bb013926f56db79b60f6c18c392f
Version: d3b62dbfc7b9bb013926f56db79b60f6c18c392f
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/exynos/exynos_drm_vidi.c"
          ],
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "version": "6.19.1",
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              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/exynos: vidi: use ctx-\u003elock to protect struct vidi_context member variables related to memory alloc/free\n\nExynos Virtual Display driver performs memory alloc/free operations\nwithout lock protection, which easily causes concurrency problem.\n\nFor example, use-after-free can occur in race scenario like this:\n```\n\tCPU0\t\t\t\tCPU1\t\t\t\tCPU2\n\t----\t\t\t\t----\t\t\t\t----\n  vidi_connection_ioctl()\n    if (vidi-\u003econnection) // true\n      drm_edid = drm_edid_alloc(); // alloc drm_edid\n      ...\n      ctx-\u003eraw_edid = drm_edid;\n      ...\n\t\t\t\t\t\t\t\tdrm_mode_getconnector()\n\t\t\t\t\t\t\t\t  drm_helper_probe_single_connector_modes()\n\t\t\t\t\t\t\t\t    vidi_get_modes()\n\t\t\t\t\t\t\t\t      if (ctx-\u003eraw_edid) // true\n\t\t\t\t\t\t\t\t        drm_edid_dup(ctx-\u003eraw_edid);\n\t\t\t\t\t\t\t\t          if (!drm_edid) // false\n\t\t\t\t\t\t\t\t          ...\n\t\t\t\tvidi_connection_ioctl()\n\t\t\t\t  if (vidi-\u003econnection) // false\n\t\t\t\t    drm_edid_free(ctx-\u003eraw_edid); // free drm_edid\n\t\t\t\t    ...\n\t\t\t\t\t\t\t\t          drm_edid_alloc(drm_edid-\u003eedid)\n\t\t\t\t\t\t\t\t            kmemdup(edid); // UAF!!\n\t\t\t\t\t\t\t\t            ...\n```\n\nTo prevent these vulns, at least in vidi_context, member variables related\nto memory alloc/free should be protected with ctx-\u003elock."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:02:43.193Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/92dd1f38d7db75374dcdaf54f1d79d67bffd54e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13"
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          "url": "https://git.kernel.org/stable/c/abfdf449fb3d7b42e85a1ad1c8694b768b1582f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893"
        },
        {
          "url": "https://git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385"
        },
        {
          "url": "https://git.kernel.org/stable/c/52b330799e2d6f825ae2bb74662ec1b10eb954bb"
        }
      ],
      "title": "drm/exynos: vidi: use ctx-\u003elock to protect struct vidi_context member variables related to memory alloc/free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23227",
    "datePublished": "2026-02-18T14:53:30.784Z",
    "dateReserved": "2026-01-13T15:37:45.987Z",
    "dateUpdated": "2026-04-13T06:02:43.193Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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