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GHSA-JV3R-47PW-5225

Vulnerability from github – Published: 2025-04-16 15:34 – Updated: 2025-11-03 21:33
VLAI
Details

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

media: streamzap: fix race between device disconnection and urb callback

Syzkaller has reported a general protection fault at function ir_raw_event_store_with_filter(). This crash is caused by a NULL pointer dereference of dev->raw pointer, even though it is checked for NULL in the same function, which means there is a race condition. It occurs due to the incorrect order of actions in the streamzap_disconnect() function: rc_unregister_device() is called before usb_kill_urb(). The dev->raw pointer is freed and set to NULL in rc_unregister_device(), and only after that usb_kill_urb() waits for in-progress requests to finish.

If rc_unregister_device() is called while streamzap_callback() handler is not finished, this can lead to accessing freed resources. Thus rc_unregister_device() should be called after usb_kill_urb().

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2025-22027"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362",
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:15:55Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: streamzap: fix race between device disconnection and urb callback\n\nSyzkaller has reported a general protection fault at function\nir_raw_event_store_with_filter(). This crash is caused by a NULL pointer\ndereference of dev-\u003eraw pointer, even though it is checked for NULL in\nthe same function, which means there is a race condition. It occurs due\nto the incorrect order of actions in the streamzap_disconnect() function:\nrc_unregister_device() is called before usb_kill_urb(). The dev-\u003eraw\npointer is freed and set to NULL in rc_unregister_device(), and only\nafter that usb_kill_urb() waits for in-progress requests to finish.\n\nIf rc_unregister_device() is called while streamzap_callback() handler is\nnot finished, this can lead to accessing freed resources. Thus\nrc_unregister_device() should be called after usb_kill_urb().\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.",
  "id": "GHSA-jv3r-47pw-5225",
  "modified": "2025-11-03T21:33:34Z",
  "published": "2025-04-16T15:34:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22027"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15483afb930fc2f883702dc96f80efbe4055235e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30ef7cfee752ca318d5902cb67b60d9797ccd378"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4db62b60af2ccdea6ac5452fd20e29587ed85f57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8760da4b9d44c36b93b6e4cf401ec7fe520015bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/adf0ddb914c9e5b3e50da4c97959e82de2df75c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e11652a6514ec805440c1bb3739e6c6236fffcc7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1d518c0bad01abe83c2df880274cb6a39f4a457"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f656cfbc7a293a039d6a0c7100e1c846845148c1"
    },
    {
      "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:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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