ghsa-m27r-w8g9-3x9h
Vulnerability from github
Published
2025-04-01 18:30
Modified
2025-11-03 21:33
Details

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

drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl

In the "pmcmd_ioctl" function, three memory objects allocated by kmalloc are initialized by "hcall_get_cpu_state", which are then copied to user space. The initializer is indeed implemented in "acrn_hypercall2" (arch/x86/include/asm/acrn.h). There is a risk of information leakage due to uninitialized bytes.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21950"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-01T16:15:26Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl\n\nIn the \"pmcmd_ioctl\" function, three memory objects allocated by\nkmalloc are initialized by \"hcall_get_cpu_state\", which are then\ncopied to user space. The initializer is indeed implemented in\n\"acrn_hypercall2\" (arch/x86/include/asm/acrn.h). There is a risk of\ninformation leakage due to uninitialized bytes.",
  "id": "GHSA-m27r-w8g9-3x9h",
  "modified": "2025-11-03T21:33:25Z",
  "published": "2025-04-01T18:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21950"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/524f29d78c9bdeb49f31f5b0376a07d2fc5cf563"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4c21b878f0e237f45209a324c903ea7fb05247d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7e5031fe3f161c8eb5e84db1540bc4373ed861b"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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