CVE-2022-50010

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-50010
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: i740fb: Check the argument of i740_calc_vclk() Since the user can control the arguments of the ioctl() from the user space, under special arguments that may result in a divide-by-zero bug. If the user provides an improper 'pixclock' value that makes the argumet of i740_calc_vclk() less than 'I740_RFREQ_FIX', it will cause a divide-by-zero bug in: drivers/video/fbdev/i740fb.c:353 p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX))); The following log can reveal it: divide error: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:i740_calc_vclk drivers/video/fbdev/i740fb.c:353 [inline] RIP: 0010:i740fb_decode_var drivers/video/fbdev/i740fb.c:646 [inline] RIP: 0010:i740fb_set_par+0x163f/0x3b70 drivers/video/fbdev/i740fb.c:742 Call Trace: fb_set_var+0x604/0xeb0 drivers/video/fbdev/core/fbmem.c:1034 do_fb_ioctl+0x234/0x670 drivers/video/fbdev/core/fbmem.c:1110 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1189 Fix this by checking the argument of i740_calc_vclk() first.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/2b7f559152a33c55f51b569b22efbe5e24886798 Patch
https://git.kernel.org/stable/c/40bf722f8064f50200b8c4f8946cd625b441dda9 Patch
https://git.kernel.org/stable/c/4b20c61365140d432dee7da7aa294215e7b900d9 Patch
https://git.kernel.org/stable/c/59cefb583c984c0da8cf21a4c57d26d5a20dff5c Patch
https://git.kernel.org/stable/c/656689cb03ada4650016c153346939a1c334b1ae Patch
https://git.kernel.org/stable/c/d2d375eb68b4b8de6ea7460483a26fa9de56b443 Patch
https://git.kernel.org/stable/c/e740e787f06671455b59d1e498c9945f7b4e7b3b Patch
https://git.kernel.org/stable/c/f350812e2d15278f1d867eeb997407782234fb3c 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:*:*:*:*:*:*:*:*
History

14 Nov 2025, 16:59

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/2b7f559152a33c55f51b569b22efbe5e24886798 - () https://git.kernel.org/stable/c/2b7f559152a33c55f51b569b22efbe5e24886798 - Patch
References () https://git.kernel.org/stable/c/40bf722f8064f50200b8c4f8946cd625b441dda9 - () https://git.kernel.org/stable/c/40bf722f8064f50200b8c4f8946cd625b441dda9 - Patch
References () https://git.kernel.org/stable/c/4b20c61365140d432dee7da7aa294215e7b900d9 - () https://git.kernel.org/stable/c/4b20c61365140d432dee7da7aa294215e7b900d9 - Patch
References () https://git.kernel.org/stable/c/59cefb583c984c0da8cf21a4c57d26d5a20dff5c - () https://git.kernel.org/stable/c/59cefb583c984c0da8cf21a4c57d26d5a20dff5c - Patch
References () https://git.kernel.org/stable/c/656689cb03ada4650016c153346939a1c334b1ae - () https://git.kernel.org/stable/c/656689cb03ada4650016c153346939a1c334b1ae - Patch
References () https://git.kernel.org/stable/c/d2d375eb68b4b8de6ea7460483a26fa9de56b443 - () https://git.kernel.org/stable/c/d2d375eb68b4b8de6ea7460483a26fa9de56b443 - Patch
References () https://git.kernel.org/stable/c/e740e787f06671455b59d1e498c9945f7b4e7b3b - () https://git.kernel.org/stable/c/e740e787f06671455b59d1e498c9945f7b4e7b3b - Patch
References () https://git.kernel.org/stable/c/f350812e2d15278f1d867eeb997407782234fb3c - () https://git.kernel.org/stable/c/f350812e2d15278f1d867eeb997407782234fb3c - Patch
First Time Linux
Linux linux Kernel
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: video: fbdev: i740fb: Comprobación del argumento de i740_calc_vclk(). Dado que el usuario puede controlar los argumentos de ioctl() desde el espacio de usuario, bajo argumentos especiales, esto puede provocar un error de división por cero. Si el usuario proporciona un valor de 'pixclock' incorrecto que hace que el argumento de i740_calc_vclk() sea menor que 'I740_RFREQ_FIX', se producirá un error de división por cero en: drivers/video/fbdev/i740fb.c:353 p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX))); El siguiente registro puede revelarlo: error de división: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:i740_calc_vclk drivers/video/fbdev/i740fb.c:353 [en línea] RIP: 0010:i740fb_decode_var drivers/video/fbdev/i740fb.c:646 [en línea] RIP: 0010:i740fb_set_par+0x163f/0x3b70 drivers/video/fbdev/i740fb.c:742 Seguimiento de llamadas: fb_set_var+0x604/0xeb0 drivers/video/fbdev/core/fbmem.c:1034 do_fb_ioctl+0x234/0x670 drivers/video/fbdev/core/fbmem.c:1110 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1189 Solucione esto verificando primero el argumento de i740_calc_vclk().
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-369

18 Jun 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 11:15

Updated : 2025-11-14 16:59

NVD link : CVE-2022-50010

Mitre link : CVE-2022-50010

CVE.ORG link : CVE-2022-50010

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-369

Divide By Zero