CVE-2022-49948

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  3. CVE-2022-49948

7.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n 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
Link Resource
https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285 Patch
https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db Patch
https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f Patch
https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb Patch
https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a Patch
https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc Patch
https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e Patch
https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*
History

14 Nov 2025, 19:49

Type Values Removed Values Added
CWE CWE-125
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285 - () https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285 - Patch
References () https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db - () https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db - Patch
References () https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f - () https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f - Patch
References () https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb - () https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb - Patch
References () https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a - () https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a - Patch
References () https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc - () https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc - Patch
References () https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e - () https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e - Patch
References () https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e - () https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.1
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vt: Borrar la selección antes de cambiar la fuente. Al cambiar la fuente de la consola con ioctl(KDFONTOP), el nuevo tamaño de fuente puede ser mayor que el anterior. Por lo tanto, una selección anterior podría quedar fuera del nuevo tamaño de pantalla y, por lo tanto, provocar accesos fuera de los límites a la memoria gráfica si se elimina la selección en vc_do_resize(). Para evitar estos accesos fuera de memoria, elimine la selección antes de llamar a los controladores de consola con_font_set().
CPE cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*

18 Jun 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 11:15

Updated : 2025-11-14 19:49

NVD link : CVE-2022-49948

Mitre link : CVE-2022-49948

CVE.ORG link : CVE-2022-49948

JSON object : View

Products Affected

linux

CWE
CWE-125

Out-of-bounds Read