fkie_cve-2022-50101
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-06-18 13:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: vt8623fb: Check the size of screen before memset_io() In the function vt8623fb_set_par(), the value of 'screen_size' is calculated by the user input. If the user provides the improper value, the value of 'screen_size' may larger than 'info->screen_size', which may cause the following bug: [ 583.339036] BUG: unable to handle page fault for address: ffffc90005000000 [ 583.339049] #PF: supervisor write access in kernel mode [ 583.339052] #PF: error_code(0x0002) - not-present page [ 583.339074] RIP: 0010:memset_orig+0x33/0xb0 [ 583.339110] Call Trace: [ 583.339118] vt8623fb_set_par+0x11cd/0x21e0 [ 583.339146] fb_set_var+0x604/0xeb0 [ 583.339181] do_fb_ioctl+0x234/0x670 [ 583.339209] fb_ioctl+0xdd/0x130 Fix the this by checking the value of 'screen_size' before memset_io().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73280a184aa2e1a625ce54ce761042955cc79cd0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b17caec5127bba6f90af92bcc85871df54548ac0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d71528ccdc7ae8d7500d414091d27805c51407a2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ec0754c60217248fa77cc9005d66b2b55200ac06
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: vt8623fb: Check the size of screen before memset_io()\n\nIn the function vt8623fb_set_par(), the value of \u0027screen_size\u0027 is\ncalculated by the user input. If the user provides the improper value,\nthe value of \u0027screen_size\u0027 may larger than \u0027info-\u003escreen_size\u0027, which\nmay cause the following bug:\n\n[  583.339036] BUG: unable to handle page fault for address: ffffc90005000000\n[  583.339049] #PF: supervisor write access in kernel mode\n[  583.339052] #PF: error_code(0x0002) - not-present page\n[  583.339074] RIP: 0010:memset_orig+0x33/0xb0\n[  583.339110] Call Trace:\n[  583.339118]  vt8623fb_set_par+0x11cd/0x21e0\n[  583.339146]  fb_set_var+0x604/0xeb0\n[  583.339181]  do_fb_ioctl+0x234/0x670\n[  583.339209]  fb_ioctl+0xdd/0x130\n\nFix the this by checking the value of \u0027screen_size\u0027 before memset_io()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: video: fbdev: vt8623fb: Verifique el tama\u00f1o de la pantalla antes de memset_io() En la funci\u00f3n vt8623fb_set_par(), el valor de \u0027screen_size\u0027 se calcula mediante la entrada del usuario. Si el usuario proporciona un valor incorrecto, el valor de \u0027screen_size\u0027 puede ser mayor que \u0027info-\u0026gt;screen_size\u0027, lo que puede causar el siguiente error: [ 583.339036] ERROR: no se puede manejar el error de p\u00e1gina para la direcci\u00f3n: ffffc90005000000 [ 583.339049] #PF: acceso de escritura del supervisor en modo kernel [ 583.339052] #PF: error_code(0x0002) - p\u00e1gina no presente [ 583.339074] RIP: 0010:memset_orig+0x33/0xb0 [ 583.339110] Rastreo de llamadas: [ 583.339118] vt8623fb_set_par+0x11cd/0x21e0 [ 583.339146] fb_set_var+0x604/0xeb0 [ 583.339181] do_fb_ioctl+0x234/0x670 [ 583.339209] fb_ioctl+0xdd/0x130 Solucione este problema comprobando el valor de \u0027screen_size\u0027 antes de memset_io()."
    }
  ],
  "id": "CVE-2022-50101",
  "lastModified": "2025-06-18T13:47:40.833",
  "metrics": {},
  "published": "2025-06-18T11:15:39.437",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/73280a184aa2e1a625ce54ce761042955cc79cd0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b17caec5127bba6f90af92bcc85871df54548ac0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d71528ccdc7ae8d7500d414091d27805c51407a2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ec0754c60217248fa77cc9005d66b2b55200ac06"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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