CVE-2026-68303 (GCVE-0-2026-68303)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:02 – Updated: 2026-09-21 13:13
VLAI
Title
drm/vc4: hvs/v3d: Fix null dereference in unbind
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: hvs/v3d: Fix null dereference in unbind The hvs and v3d drivers use dev_get_drvdata(master) in their unbind functions. Since the vc4-drm gets removed before its dependent drivers (vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to get drvdata of its master and fails with a null dereference error. Use the data pointer passed to the unbind functions directly instead of dev_get_drvdata(master). This avoids using potentially freed memory.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6618 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < 8f62aae059e06746a18a00af27179c3c0f17f4c7 (git)
Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < 708688ec31ac6b35103ba364dc300a09930079d4 (git)
Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < 261f0a3f0ac03248284f5116d3258f89c9642215 (git)
Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < 7dc3680b7ffe01add3e9299fde8471d2dd53a8ae (git)
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Linux Linux Affected: 4.4
Unaffected: 0 , < 4.4 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 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/vc4/vc4_hvs.c",
            "drivers/gpu/drm/vc4/vc4_v3d.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
              "versionType": "git"
            },
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          "vendor": "Linux",
          "versions": [
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
            }
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: hvs/v3d: Fix null dereference in unbind\n\nThe hvs and v3d drivers use dev_get_drvdata(master) in their unbind\nfunctions. Since the vc4-drm gets removed before its dependent drivers\n(vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to\nget drvdata of its master and fails with a null dereference error.\n\nUse the data pointer passed to the unbind functions directly instead of\ndev_get_drvdata(master). This avoids using potentially freed memory."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-21T13:13:41.482Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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    "datePublished": "2026-08-10T12:02:37.512Z",
    "dateReserved": "2026-07-30T09:28:09.381Z",
    "dateUpdated": "2026-09-21T13:13:41.482Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-10",
      "epss": "0.00206",
      "percentile": "0.0972"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-23T02:25:13.000Z",
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      "id": "msrc_CVE-2026-68303",
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      "product_status:known_affected": "2",
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      "status": "final",
      "title": "drm/vc4: hvs/v3d: Fix null dereference in unbind",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-68303.json",
      "version": "2"
    },
    "nvd": {
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        "cveTags": [],
        "descriptions": [
          {
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: hvs/v3d: Fix null dereference in unbind\n\nThe hvs and v3d drivers use dev_get_drvdata(master) in their unbind\nfunctions. Since the vc4-drm gets removed before its dependent drivers\n(vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to\nget drvdata of its master and fails with a null dereference error.\n\nUse the data pointer passed to the unbind functions directly instead of\ndev_get_drvdata(master). This avoids using potentially freed memory."
          }
        ],
        "id": "CVE-2026-68303",
        "lastModified": "2026-09-21T14:17:16.733",
        "metrics": {},
        "published": "2026-08-10T13:20:19.950",
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      "initial_release_date": "2026-08-14T17:14:19Z",
      "product_status:known_affected": "673",
      "product_status:known_not_affected": "60",
      "product_status:recommended": "252",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68303",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68303.json",
      "version": "12"
    }
  }
}



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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.