fkie_cve-2022-49948
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-06-18 13:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
vt: Clear selection before changing the font
When changing the console font with ioctl(KDFONTOP) the new font size
can be bigger than the previous font. A previous selection may thus now
be outside of the new screen size and thus trigger out-of-bounds
accesses to graphics memory if the selection is removed in
vc_do_resize().
Prevent such out-of-memory accesses by dropping the selection before the
various con_font_set() console handlers are called.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvt: Clear selection before changing the font\n\nWhen changing the console font with ioctl(KDFONTOP) the new font size\ncan be bigger than the previous font. A previous selection may thus now\nbe outside of the new screen size and thus trigger out-of-bounds\naccesses to graphics memory if the selection is removed in\nvc_do_resize().\n\nPrevent such out-of-memory accesses by dropping the selection before the\nvarious con_font_set() console handlers are called."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vt: Borrar la selecci\u00f3n antes de cambiar la fuente. Al cambiar la fuente de la consola con ioctl(KDFONTOP), el nuevo tama\u00f1o de fuente puede ser mayor que el anterior. Por lo tanto, una selecci\u00f3n anterior podr\u00eda quedar fuera del nuevo tama\u00f1o de pantalla y, por lo tanto, provocar accesos fuera de los l\u00edmites a la memoria gr\u00e1fica si se elimina la selecci\u00f3n en vc_do_resize(). Para evitar estos accesos fuera de memoria, elimine la selecci\u00f3n antes de llamar a los controladores de consola con_font_set()."
}
],
"id": "CVE-2022-49948",
"lastModified": "2025-06-18T13:46:52.973",
"metrics": {},
"published": "2025-06-18T11:15:21.827",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e"
}
],
"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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