ghsa-6wcc-3gxf-38rg
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
media: si470x: Fix use-after-free in si470x_int_in_callback()
syzbot reported use-after-free in si470x_int_in_callback() [1]. This indicates that urb->context, which contains struct si470x_device object, is freed when si470x_int_in_callback() is called.
The cause of this issue is that si470x_int_in_callback() is called for freed urb.
si470x_usb_driver_probe() calls si470x_start_usb(), which then calls usb_submit_urb() and si470x_start(). If si470x_start_usb() fails, si470x_usb_driver_probe() doesn't kill urb, but it just frees struct si470x_device object, as depicted below:
si470x_usb_driver_probe() ... si470x_start_usb() ... usb_submit_urb() retval = si470x_start() return retval if (retval < 0) free struct si470x_device object, but don't kill urb
This patch fixes this issue by killing urb when si470x_start_usb() fails and urb is submitted. If si470x_start_usb() fails and urb is not submitted, i.e. submitting usb fails, it just frees struct si470x_device object.
{
"affected": [],
"aliases": [
"CVE-2022-50542"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-07T16:15:38Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: si470x: Fix use-after-free in si470x_int_in_callback()\n\nsyzbot reported use-after-free in si470x_int_in_callback() [1]. This\nindicates that urb-\u003econtext, which contains struct si470x_device\nobject, is freed when si470x_int_in_callback() is called.\n\nThe cause of this issue is that si470x_int_in_callback() is called for\nfreed urb.\n\nsi470x_usb_driver_probe() calls si470x_start_usb(), which then calls\nusb_submit_urb() and si470x_start(). If si470x_start_usb() fails,\nsi470x_usb_driver_probe() doesn\u0027t kill urb, but it just frees struct\nsi470x_device object, as depicted below:\n\nsi470x_usb_driver_probe()\n ...\n si470x_start_usb()\n ...\n usb_submit_urb()\n retval = si470x_start()\n return retval\n if (retval \u003c 0)\n free struct si470x_device object, but don\u0027t kill urb\n\nThis patch fixes this issue by killing urb when si470x_start_usb()\nfails and urb is submitted. If si470x_start_usb() fails and urb is\nnot submitted, i.e. submitting usb fails, it just frees struct\nsi470x_device object.",
"id": "GHSA-6wcc-3gxf-38rg",
"modified": "2025-10-07T18:31:09Z",
"published": "2025-10-07T18:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50542"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/63648a7bd1a7599bcc2040a6d1792363ae4c2e1b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.