ghsa-m8p9-q552-5h79
Vulnerability from github
Published
2025-04-20 09:30
Modified
2025-11-03 21:33
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:

HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition

In the ssi_protocol_probe() function, &ssi->work is bound with ssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function within the ssip_pn_ops structure is capable of starting the work.

If we remove the module which will call ssi_protocol_remove() to make a cleanup, it will free ssi through kfree(ssi), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows:

CPU0 CPU1

                    | ssip_xmit_work

ssi_protocol_remove | kfree(ssi); | | struct hsi_client *cl = ssi->cl; | // use ssi

Fix it by ensuring that the work is canceled before proceeding with the cleanup in ssi_protocol_remove().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-37838"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-18T15:15:59Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition\n\nIn the ssi_protocol_probe() function, \u0026ssi-\u003ework is bound with\nssip_xmit_work(), In ssip_pn_setup(), the ssip_pn_xmit() function\nwithin the ssip_pn_ops structure is capable of starting the\nwork.\n\nIf we remove the module which will call ssi_protocol_remove()\nto make a cleanup, it will free ssi through kfree(ssi),\nwhile the work mentioned above will be used. The sequence\nof operations that may lead to a UAF bug is as follows:\n\nCPU0                                    CPU1\n\n                        | ssip_xmit_work\nssi_protocol_remove     |\nkfree(ssi);             |\n                        | struct hsi_client *cl = ssi-\u003ecl;\n                        | // use ssi\n\nFix it by ensuring that the work is canceled before proceeding\nwith the cleanup in ssi_protocol_remove().",
  "id": "GHSA-m8p9-q552-5h79",
  "modified": "2025-11-03T21:33:41Z",
  "published": "2025-04-20T09:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37838"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a8c29beb8a02b5a0a9d77d608aa14b6f88a6b86"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b4194c9a7a8f92db39e8e86c85f4fb12ebbec4f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58eb29dba712ab0f13af59ca2fe545f5ce360e78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72972552d0d0bfeb2dec5daf343a19018db36ffa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/834e602d0cc7c743bfce734fad4a46cefc0f9ab1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae5a6a0b425e8f76a9f0677e50796e494e89b088"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d03abc1c2b21324550fa71e12d53e7d3498e0af6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d58493832e284f066e559b8da5ab20c15a2801d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3f88665a78045fe35c7669d2926b8d97b892c11"
    },
    {
      "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:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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