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GHSA-VRJC-HPCH-XWFV

Vulnerability from github – Published: 2025-07-03 09:30 – Updated: 2025-12-17 18:31
VLAI
Details

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

coresight: prevent deactivate active config while enabling the config

While enable active config via cscfg_csdev_enable_active_config(), active config could be deactivated via configfs' sysfs interface. This could make UAF issue in below scenario:

CPU0 CPU1 (sysfs enable) load module cscfg_load_config_sets() activate config. // sysfs (sys_active_cnt == 1) ... cscfg_csdev_enable_active_config() lock(csdev->cscfg_csdev_lock) // here load config activate by CPU1 unlock(csdev->cscfg_csdev_lock)

                                          deactivate config // sysfs
                                          (sys_activec_cnt == 0)
                                          cscfg_unload_config_sets()
                                          unload module

// access to config_desc which freed // while unloading module. cscfg_csdev_enable_config

To address this, use cscfg_config_desc's active_cnt as a reference count which will be holded when - activate the config. - enable the activated config. and put the module reference when config_active_cnt == 0.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2025-38131"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-03T09:15:27Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: prevent deactivate active config while enabling the config\n\nWhile enable active config via cscfg_csdev_enable_active_config(),\nactive config could be deactivated via configfs\u0027 sysfs interface.\nThis could make UAF issue in below scenario:\n\nCPU0                                          CPU1\n(sysfs enable)                                load module\n                                              cscfg_load_config_sets()\n                                              activate config. // sysfs\n                                              (sys_active_cnt == 1)\n...\ncscfg_csdev_enable_active_config()\nlock(csdev-\u003ecscfg_csdev_lock)\n// here load config activate by CPU1\nunlock(csdev-\u003ecscfg_csdev_lock)\n\n                                              deactivate config // sysfs\n                                              (sys_activec_cnt == 0)\n                                              cscfg_unload_config_sets()\n                                              unload module\n\n// access to config_desc which freed\n// while unloading module.\ncscfg_csdev_enable_config\n\nTo address this, use cscfg_config_desc\u0027s active_cnt as a reference count\n which will be holded when\n    - activate the config.\n    - enable the activated config.\nand put the module reference when config_active_cnt == 0.",
  "id": "GHSA-vrjc-hpch-xwfv",
  "modified": "2025-12-17T18:31:32Z",
  "published": "2025-07-03T09:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38131"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31028812724cef7bd57a51525ce58a32a6d73b22"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/408c97c4a5e0b634dcd15bf8b8808b382e888164"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3b4efa2e623aecaebd7c9b9e4171f5c659e9724"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfe8224c9c7a43d356eb9f74b06868aa05f90223"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed42ee1ed05ff2f4c36938379057413a40c56680"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.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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