ghsa-7792-f3h4-qxjq
Vulnerability from github
Published
2025-01-31 12:33
Modified
2025-11-03 21:32
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

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

zram: fix potential UAF of zram table

If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21671"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-31T12:15:28Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix potential UAF of zram table\n\nIf zram_meta_alloc failed early, it frees allocated zram-\u003etable without\nsetting it NULL.  Which will potentially cause zram_meta_free to access\nthe table if user reset an failed and uninitialized device.",
  "id": "GHSA-7792-f3h4-qxjq",
  "modified": "2025-11-03T21:32:30Z",
  "published": "2025-01-31T12:33:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21671"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/212fe1c0df4a150fb6298db2cfff267ceaba5402"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/571d3f6045cd3a6d9f6aec33b678f3ffe97582ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/902ef8f16d5ca77edc77c30656be54186c1e99b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe3de867f94819ba0f28e035c0b0182150147d95"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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