ghsa-p42v-4mrm-3j3g
Vulnerability from github
Published
2025-04-03 09:32
Modified
2025-11-03 21:33
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

drm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()

On the off chance that command stream passed from userspace via ioctl() call to radeon_vce_cs_parse() is weirdly crafted and first command to execute is to encode (case 0x03000001), the function in question will attempt to call radeon_vce_cs_reloc() with size argument that has not been properly initialized. Specifically, 'size' will point to 'tmp' variable before the latter had a chance to be assigned any value.

Play it safe and init 'tmp' with 0, thus ensuring that radeon_vce_cs_reloc() will catch an early error in cases like these.

Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE.

(cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21996"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-03T08:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/radeon: fix uninitialized size issue in radeon_vce_cs_parse()\n\nOn the off chance that command stream passed from userspace via\nioctl() call to radeon_vce_cs_parse() is weirdly crafted and\nfirst command to execute is to encode (case 0x03000001), the function\nin question will attempt to call radeon_vce_cs_reloc() with size\nargument that has not been properly initialized. Specifically, \u0027size\u0027\nwill point to \u0027tmp\u0027 variable before the latter had a chance to be\nassigned any value.\n\nPlay it safe and init \u0027tmp\u0027 with 0, thus ensuring that\nradeon_vce_cs_reloc() will catch an early error in cases like these.\n\nFound by Linux Verification Center (linuxtesting.org) with static\nanalysis tool SVACE.\n\n(cherry picked from commit 2d52de55f9ee7aaee0e09ac443f77855989c6b68)",
  "id": "GHSA-p42v-4mrm-3j3g",
  "modified": "2025-11-03T21:33:29Z",
  "published": "2025-04-03T09:32:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21996"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0effb378ebce52b897f85cd7f828854b8c7cb636"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ce08215cad55c10a6eeeb33d3583b6cfffe3ab8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b4d9d20fd455a97920cf158dd19163b879cf65d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78b07dada3f02f77762d0755a96d35f53b02be69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b2da9c673a0da1359a2151f7ce773e2f77d71a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd1801aa01bba1760357f2a641346ae149686713"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd8689b52a24807c2d5ce0a17cb26dc87f75235c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5e049028124f755283f2c07e7a3708361ed1dc8"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "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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