fkie_cve-2022-50099
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-11-19 14:07
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: arkfb: Check the size of screen before memset_io() In the function arkfb_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: [ 659.399066] BUG: unable to handle page fault for address: ffffc90003000000 [ 659.399077] #PF: supervisor write access in kernel mode [ 659.399079] #PF: error_code(0x0002) - not-present page [ 659.399094] RIP: 0010:memset_orig+0x33/0xb0 [ 659.399116] Call Trace: [ 659.399122] arkfb_set_par+0x143f/0x24c0 [ 659.399130] fb_set_var+0x604/0xeb0 [ 659.399161] do_fb_ioctl+0x234/0x670 [ 659.399189] 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/0701df594bc1d7ae55fed407fb65dd90a93f8a9cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09e733d6ac948e6fda4b16252e44ea46f98fc8b4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/352305ea50d682b8e081d826da53caf9e744d7d0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a20c5510aa2c031a096a58deb356e91609781c9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53198b81930e567ad6b879812d88052a1e8ac79ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bcb1a06e3091716b7cbebe0e91d1de9895068cdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96b550971c65d54d64728d8ba973487878a06454Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: arkfb: Check the size of screen before memset_io()\n\nIn the function arkfb_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[  659.399066] BUG: unable to handle page fault for address: ffffc90003000000\n[  659.399077] #PF: supervisor write access in kernel mode\n[  659.399079] #PF: error_code(0x0002) - not-present page\n[  659.399094] RIP: 0010:memset_orig+0x33/0xb0\n[  659.399116] Call Trace:\n[  659.399122]  arkfb_set_par+0x143f/0x24c0\n[  659.399130]  fb_set_var+0x604/0xeb0\n[  659.399161]  do_fb_ioctl+0x234/0x670\n[  659.399189]  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: arkfb: Verifique el tama\u00f1o de la pantalla antes de memset_io() En la funci\u00f3n arkfb_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: [ 659.399066] ERROR: no se puede manejar el error de p\u00e1gina para la direcci\u00f3n: ffffc90003000000 [ 659.399077] #PF: acceso de escritura del supervisor en modo kernel [ 659.399079] #PF: error_code(0x0002) - p\u00e1gina no presente [ 659.399094] RIP: 0010:memset_orig+0x33/0xb0 [ 659.399116] Rastreo de llamadas: [ 659.399122] arkfb_set_par+0x143f/0x24c0 [ 659.399130] fb_set_var+0x604/0xeb0 [ 659.399161] do_fb_ioctl+0x234/0x670 [ 659.399189] fb_ioctl+0xdd/0x130 Solucione este problema comprobando el valor de \u0027screen_size\u0027 antes de memset_io()."
    }
  ],
  "id": "CVE-2022-50099",
  "lastModified": "2025-11-19T14:07:47.630",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
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  "published": "2025-06-18T11:15:39.200",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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}


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