GHSA-C6H3-G88W-QCM8

Vulnerability from github – Published: 2024-05-01 06:31 – Updated: 2024-06-03 18:55
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

drm/vmwgfx: Fix possible null pointer derefence with invalid contexts

vmw_context_cotable can return either an error or a null pointer and its usage sometimes went unchecked. Subsequent code would then try to access either a null pointer or an error value.

The invalid dereferences were only possible with malformed userspace apps which never properly initialized the rendering contexts.

Check the results of vmw_context_cotable to fix the invalid derefs.

Thanks: ziming zhang(@ezrak1e) from Ant Group Light-Year Security Lab who was the first person to discover it. Niels De Graef who reported it and helped to track down the poc.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-26979"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T06:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Fix possible null pointer derefence with invalid contexts\n\nvmw_context_cotable can return either an error or a null pointer and its\nusage sometimes went unchecked. Subsequent code would then try to access\neither a null pointer or an error value.\n\nThe invalid dereferences were only possible with malformed userspace\napps which never properly initialized the rendering contexts.\n\nCheck the results of vmw_context_cotable to fix the invalid derefs.\n\nThanks:\nziming zhang(@ezrak1e) from Ant Group Light-Year Security Lab\nwho was the first person to discover it.\nNiels De Graef who reported it and helped to track down the poc.",
  "id": "GHSA-c6h3-g88w-qcm8",
  "modified": "2024-06-03T18:55:51Z",
  "published": "2024-05-01T06:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26979"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07c3fe923ff7eccf684fb4f8c953d0a7cc8ded73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/517621b7060096e48e42f545fa6646fc00252eac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/585fec7361e7850bead21fada49a7fcde2f2e791"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/899e154f9546fcae18065d74064889d08fff62c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cb3755b1e3680b720b74dbedfac889e904605c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c560327d900bab968c2e1b4cd7fa2d46cd429e3d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff41e0d4f3fa10d7cdd7d40f8026bea9fcc8b000"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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