FKIE_CVE-2022-50542
Vulnerability from fkie_nvd - Published: 2025-10-07 16:15 - Updated: 2026-06-17 05:23
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/media/radio/si470x/radio-si470x-usb.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "146bd005ebb01ae190c22af050cb98623958c373",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
},
{
"lessThan": "8c6151b8e8dd2d98ad2cd725d26d1e103d989891",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
},
{
"lessThan": "52f54fe78cca24850a30865037250f63eb3d5bf7",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
},
{
"lessThan": "0ca298d548461d29615f9a2b1309e8dcf4a352c6",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
},
{
"lessThan": "1c6447d0fc68650e51586dde79b5090d9d77f13a",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
"lessThan": "63648a7bd1a7599bcc2040a6d1792363ae4c2e1b",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
},
{
"lessThan": "92b0888398e4ba51d93b618a6506781f4e3879c9",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
},
{
"lessThan": "7d21e0b1b41b21d628bf2afce777727bd4479aa5",
"status": "affected",
"version": "779471110c6f0f7f7c223fc696170ec750ac3531",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/media/radio/si470x/radio-si470x-usb.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.6"
},
{
"lessThan": "3.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.337",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.303",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.270",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.86",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
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"negate": false,
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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": "CVE-2022-50542",
"lastModified": "2026-06-17T05:23:45.393",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2025-10-07T16:15:38.557",
"references": [
{
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"tags": [
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],
"url": "https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6"
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{
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891"
},
{
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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