CVE-2022-50101 (GCVE-0-2022-50101)
Vulnerability from cvelistv5
Published
2025-06-18 11:02
Modified
2025-06-18 11:02
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
Impacted products
Vendor Product Version
Linux Linux Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
Version: 558b7bd86c32978648cda5deb5c758d77ef0c165
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/vt8623fb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "2.6.22"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "4.14.291",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.256",
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            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.211",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.137",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.61",
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            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.18",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.19.2",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "vulnerable": true
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.137",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:02:37.297Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/73280a184aa2e1a625ce54ce761042955cc79cd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150"
        },
        {
          "url": "https://git.kernel.org/stable/c/d71528ccdc7ae8d7500d414091d27805c51407a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b17caec5127bba6f90af92bcc85871df54548ac0"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec0754c60217248fa77cc9005d66b2b55200ac06"
        }
      ],
      "title": "video: fbdev: vt8623fb: Check the size of screen before memset_io()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50101",
    "datePublished": "2025-06-18T11:02:37.297Z",
    "dateReserved": "2025-06-18T10:57:27.412Z",
    "dateUpdated": "2025-06-18T11:02:37.297Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50101\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:39.437\",\"lastModified\":\"2025-06-18T13:47:40.833\",\"vulnStatus\":\"Awaiting Analysis\",\"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().\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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