fkie_cve-2022-49147
Vulnerability from fkie_nvd
Published
2025-02-26 07:00
Modified
2025-02-26 07:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
block: Fix the maximum minor value is blk_alloc_ext_minor()
ida_alloc_range(..., min, max, ...) returns values from min to max,
inclusive.
So, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().
This is an issue because in device_add_disk(), this value is used in:
ddev->devt = MKDEV(disk->major, disk->first_minor);
and NR_EXT_DEVT is '(1 << MINORBITS)'.
So, should 'disk->first_minor' be NR_EXT_DEVT, it would overflow.
References
Impacted products
| Vendor | Product | Version |
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{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix the maximum minor value is blk_alloc_ext_minor()\n\nida_alloc_range(..., min, max, ...) returns values from min to max,\ninclusive.\n\nSo, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().\n\nThis is an issue because in device_add_disk(), this value is used in:\n ddev-\u003edevt = MKDEV(disk-\u003emajor, disk-\u003efirst_minor);\nand NR_EXT_DEVT is \u0027(1 \u003c\u003c MINORBITS)\u0027.\n\nSo, should \u0027disk-\u003efirst_minor\u0027 be NR_EXT_DEVT, it would overflow."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: Fix el valor menor m\u00e1ximo es blk_alloc_ext_minor() ida_alloc_range(..., min, max, ...) devuelve valores de min a max, ambos incluidos. Por lo tanto, NR_EXT_DEVT es un idx v\u00e1lido devuelto por blk_alloc_ext_minor(). Esto es un problema porque en device_add_disk(), este valor se usa en: ddev-\u0026gt;devt = MKDEV(disk-\u0026gt;major, disk-\u0026gt;first_minor); y NR_EXT_DEVT es \u0027(1 \u0026lt;\u0026lt; MINORBITS)\u0027. Por lo tanto, si \u0027disk-\u0026gt;first_minor\u0027 fuera NR_EXT_DEVT, se desbordar\u00eda."
}
],
"id": "CVE-2022-49147",
"lastModified": "2025-02-26T07:00:51.887",
"metrics": {},
"published": "2025-02-26T07:00:51.887",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0f8cf8f5ccbad25ed6828875b222dbab29d5c272"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5b9ac3727e4abb11c9cfbe9c0781fc05dfdd7cfb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d1868328dec5ae2cf210111025fcbc71f78dd5ca"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fbe2cc4525480ddd20c866bb5c0578071e01451a"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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