CVE-2026-68238 (GCVE-0-2026-68238)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-17 05:01
VLAI
Title
drm/amdgpu: Release VFCT ACPI table reference
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Release VFCT ACPI table reference amdgpu_acpi_vfct_bios() fetches the VFCT table with acpi_get_table() but never releases it. acpi_get_table() takes a reference on the table (incrementing its validation_count and mapping it on the 0->1 transition); without a paired acpi_put_table() the mapping is leaked on every call, whether or not a matching VBIOS image is found. Route all exit paths after the table is acquired through a common acpi_put_table(). The VBIOS image is copied out with kmemdup() before the table is released, so it remains valid for the caller. (cherry picked from commit ca5988682b4cba4cd125a0fa99b2de1239164ae4)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 312278b3091912fa56a6a587609f17dcb33465c2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9b7de3ee5d2c5ee2a706e5f7ca0126f4fbea4da8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 65bff26617607c1331283232016c0e89088c5b78 (git)
Affected: 0 , < 6.18.42 (semver)
Affected: 0 , < 7.1.6 (semver)
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Linux Linux Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c"
          ],
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      "cpeApplicability": [
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Release VFCT ACPI table reference\n\namdgpu_acpi_vfct_bios() fetches the VFCT table with acpi_get_table()\nbut never releases it. acpi_get_table() takes a reference on the\ntable (incrementing its validation_count and mapping it on the 0-\u003e1\ntransition); without a paired acpi_put_table() the mapping is leaked\non every call, whether or not a matching VBIOS image is found.\n\nRoute all exit paths after the table is acquired through a common\nacpi_put_table(). The VBIOS image is copied out with kmemdup() before\nthe table is released, so it remains valid for the caller.\n\n(cherry picked from commit ca5988682b4cba4cd125a0fa99b2de1239164ae4)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:01:27.365Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/312278b3091912fa56a6a587609f17dcb33465c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b7de3ee5d2c5ee2a706e5f7ca0126f4fbea4da8"
        },
        {
          "url": "https://git.kernel.org/stable/c/65bff26617607c1331283232016c0e89088c5b78"
        }
      ],
      "title": "drm/amdgpu: Release VFCT ACPI table reference",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68238",
    "datePublished": "2026-08-10T12:01:03.277Z",
    "dateReserved": "2026-07-30T09:28:09.376Z",
    "dateUpdated": "2026-08-17T05:01:27.365Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-08-20",
      "epss": "0.00166",
      "percentile": "0.06329"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68238\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:12.163\",\"lastModified\":\"2026-08-17T05:18:26.097\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: Release VFCT ACPI table reference\\n\\namdgpu_acpi_vfct_bios() fetches the VFCT table with acpi_get_table()\\nbut never releases it. acpi_get_table() takes a reference on the\\ntable (incrementing its validation_count and mapping it on the 0-\u003e1\\ntransition); without a paired acpi_put_table() the mapping is leaked\\non every call, whether or not a matching VBIOS image is found.\\n\\nRoute all exit paths after the table is acquired through a common\\nacpi_put_table(). The VBIOS image is copied out with kmemdup() before\\nthe table is released, so it remains valid for the caller.\\n\\n(cherry picked from commit ca5988682b4cba4cd125a0fa99b2de1239164ae4)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"312278b3091912fa56a6a587609f17dcb33465c2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"9b7de3ee5d2c5ee2a706e5f7ca0126f4fbea4da8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"65bff26617607c1331283232016c0e89088c5b78\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.18.42\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"7.1.6\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/312278b3091912fa56a6a587609f17dcb33465c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/65bff26617607c1331283232016c0e89088c5b78\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9b7de3ee5d2c5ee2a706e5f7ca0126f4fbea4da8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-14T14:01:51+00:00",
      "cve": "CVE-2026-68238",
      "id": "CVE-2026-68238",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu: Release VFCT ACPI table reference",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68238.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

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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.