CVE-2026-23227 (GCVE-0-2026-23227)

Vulnerability from cvelistv5 – Published: 2026-02-18 14:53 – Updated: 2026-05-11 22:02
VLAI
Title
drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < 56966a4cfa925ec24edb68ab652a740a7abe2c4d (git)
Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < 9e1ef9396a1899925911b1729cb65665420268df (git)
Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < 92dd1f38d7db75374dcdaf54f1d79d67bffd54e5 (git)
Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < 1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13 (git)
Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < abfdf449fb3d7b42e85a1ad1c8694b768b1582f4 (git)
Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < 60b75407c172e1f341a8a5097c5cbc97dbbdd893 (git)
Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < 0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385 (git)
Affected: d3b62dbfc7b9bb013926f56db79b60f6c18c392f , < 52b330799e2d6f825ae2bb74662ec1b10eb954bb (git)
Create a notification for this product.
Linux Linux Affected: 3.6
Unaffected: 0 , < 3.6 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.11 , ≤ 6.18.* (semver)
Unaffected: 6.19.1 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "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."
        }
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        "dateUpdated": "2026-05-11T22:02:46.926Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/56966a4cfa925ec24edb68ab652a740a7abe2c4d"
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          "url": "https://git.kernel.org/stable/c/9e1ef9396a1899925911b1729cb65665420268df"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23227",
    "datePublished": "2026-02-18T14:53:30.784Z",
    "dateReserved": "2026-01-13T15:37:45.987Z",
    "dateUpdated": "2026-05-11T22:02:46.926Z",
    "state": "PUBLISHED"
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    "epss": {
      "cve": "CVE-2026-23227",
      "date": "2026-07-21",
      "epss": "0.00152",
      "percentile": "0.04839"
    },
    "microsoft_vex": {
      "current_release_date": "2026-03-27T01:41:30.000Z",
      "cve": "CVE-2026-23227",
      "id": "msrc_CVE-2026-23227",
      "initial_release_date": "2026-02-02T00:00:00.000Z",
      "product_status:known_not_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "drm/exynos: vidi: use ctx-\u003elock to protect struct vidi_context member variables related to memory alloc/free",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-23227.json",
      "version": "3"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23227\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-18T16:22:32.467\",\"lastModified\":\"2026-06-17T10:21:08.403\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"Se ha resuelto la siguiente vulnerabilidad en el kernel de Linux:\\n\\ndrm/exynos: vidi: usar ctx-\u0026gt;lock para proteger las variables miembro de la estructura vidi_context relacionadas con la asignaci\u00f3n/liberaci\u00f3n de memoria\\n\\nEl controlador de pantalla virtual de Exynos realiza operaciones de asignaci\u00f3n/liberaci\u00f3n de memoria sin protecci\u00f3n de bloqueo, lo que f\u00e1cilmente causa un problema de concurrencia.\\n\\nPor ejemplo, el uso despu\u00e9s de liberaci\u00f3n puede ocurrir en un escenario de carrera como este:\\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-\u0026gt;connection) // true\\n      drm_edid = drm_edid_alloc(); // alloc drm_edid\\n      ...\\n      ctx-\u0026gt;raw_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-\u0026gt;raw_edid) // true\\n\\t\\t\\t\\t\\t\\t\\t\\t        drm_edid_dup(ctx-\u0026gt;raw_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-\u0026gt;connection) // false\\n\\t\\t\\t\\t    drm_edid_free(ctx-\u0026gt;raw_edid); // free drm_edid\\n\\t\\t\\t\\t    ...\\n\\t\\t\\t\\t\\t\\t\\t\\t          drm_edid_alloc(drm_edid-\u0026gt;edid)\\n\\t\\t\\t\\t\\t\\t\\t\\t            kmemdup(edid); // UAF!!\\n\\t\\t\\t\\t\\t\\t\\t\\t            ...\\n```\\n\\nPara prevenir estas vulnerabilidades, al menos en vidi_context, las variables miembro relacionadas con la asignaci\u00f3n/liberaci\u00f3n de memoria deber\u00edan ser protegidas con ctx-\u0026gt;lock.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/exynos/exynos_drm_vidi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"56966a4cfa925ec24edb68ab652a740a7abe2c4d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"9e1ef9396a1899925911b1729cb65665420268df\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"92dd1f38d7db75374dcdaf54f1d79d67bffd54e5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"abfdf449fb3d7b42e85a1ad1c8694b768b1582f4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"60b75407c172e1f341a8a5097c5cbc97dbbdd893\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d3b62dbfc7b9bb013926f56db79b60f6c18c392f\",\"lessThan\":\"52b330799e2d6f825ae2bb74662ec1b10eb954bb\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/exynos/exynos_drm_vidi.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.253\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.167\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.77\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.11\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.1\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.6\",\"versionEndExcluding\":\"6.12.77\",\"matchCriteriaId\":\"B6F320FA-255D-4544-9CA5-33D757F74941\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.11\",\"matchCriteriaId\":\"7099A9EC-3D54-4424-BF01-7224EF88C79C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.1\",\"matchCriteriaId\":\"EE543C0D-A06B-414F-A403-CB1E088F261E\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/52b330799e2d6f825ae2bb74662ec1b10eb954bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/56966a4cfa925ec24edb68ab652a740a7abe2c4d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/92dd1f38d7db75374dcdaf54f1d79d67bffd54e5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e1ef9396a1899925911b1729cb65665420268df\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/abfdf449fb3d7b42e85a1ad1c8694b768b1582f4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:19:37+00:00",
      "cve": "CVE-2026-23227",
      "id": "CVE-2026-23227",
      "initial_release_date": "2026-02-18T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/exynos: vidi: use ctx-\u003elock to protect struct vidi_context member variables related to memory alloc/free",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23227.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.