usn-5598-1
Vulnerability from osv_ubuntu
Published
2022-09-05 22:10
Modified
2026-06-03 10:45
Summary
linux-oracle vulnerability
Details

It was discovered that the virtual terminal driver in the Linux kernel did not properly handle VGA console font changes, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-33656",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-4.15.0-1105-oracle",
            "binary_version": "4.15.0-1105.116"
          },
          {
            "binary_name": "linux-headers-4.15.0-1105-oracle",
            "binary_version": "4.15.0-1105.116"
          },
          {
            "binary_name": "linux-image-unsigned-4.15.0-1105-oracle",
            "binary_version": "4.15.0-1105.116"
          },
          {
            "binary_name": "linux-modules-4.15.0-1105-oracle",
            "binary_version": "4.15.0-1105.116"
          },
          {
            "binary_name": "linux-modules-extra-4.15.0-1105-oracle",
            "binary_version": "4.15.0-1105.116"
          },
          {
            "binary_name": "linux-oracle-headers-4.15.0-1105",
            "binary_version": "4.15.0-1105.116"
          },
          {
            "binary_name": "linux-oracle-tools-4.15.0-1105",
            "binary_version": "4.15.0-1105.116"
          },
          {
            "binary_name": "linux-tools-4.15.0-1105-oracle",
            "binary_version": "4.15.0-1105.116"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "linux-oracle",
        "purl": "pkg:deb/ubuntu/linux-oracle@4.15.0-1105.116?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.15.0-1105.116"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.15.0-1007.9",
        "4.15.0-1008.10",
        "4.15.0-1009.11",
        "4.15.0-1010.12",
        "4.15.0-1011.13",
        "4.15.0-1013.15",
        "4.15.0-1014.16",
        "4.15.0-1015.17",
        "4.15.0-1017.19",
        "4.15.0-1018.20",
        "4.15.0-1021.23",
        "4.15.0-1022.25",
        "4.15.0-1023.26",
        "4.15.0-1025.28",
        "4.15.0-1026.29",
        "4.15.0-1027.30",
        "4.15.0-1029.32",
        "4.15.0-1030.33",
        "4.15.0-1031.34",
        "4.15.0-1033.36",
        "4.15.0-1035.39",
        "4.15.0-1037.41",
        "4.15.0-1038.42",
        "4.15.0-1039.43",
        "4.15.0-1045.49",
        "4.15.0-1047.51",
        "4.15.0-1048.52",
        "4.15.0-1050.54",
        "4.15.0-1051.55",
        "4.15.0-1053.57",
        "4.15.0-1054.58",
        "4.15.0-1057.62",
        "4.15.0-1058.64",
        "4.15.0-1059.65",
        "4.15.0-1061.67",
        "4.15.0-1062.68",
        "4.15.0-1063.70",
        "4.15.0-1064.71",
        "4.15.0-1065.73",
        "4.15.0-1066.74",
        "4.15.0-1067.75",
        "4.15.0-1068.76",
        "4.15.0-1069.77",
        "4.15.0-1070.78",
        "4.15.0-1071.79",
        "4.15.0-1072.80",
        "4.15.0-1075.83",
        "4.15.0-1078.86",
        "4.15.0-1079.87",
        "4.15.0-1080.88",
        "4.15.0-1081.89",
        "4.15.0-1082.90",
        "4.15.0-1083.91",
        "4.15.0-1084.92",
        "4.15.0-1085.93",
        "4.15.0-1086.94",
        "4.15.0-1087.95",
        "4.15.0-1089.98",
        "4.15.0-1090.99",
        "4.15.0-1091.100",
        "4.15.0-1092.101",
        "4.15.0-1093.102",
        "4.15.0-1095.104",
        "4.15.0-1098.108",
        "4.15.0-1101.112",
        "4.15.0-1102.113",
        "4.15.0-1104.115"
      ]
    }
  ],
  "aliases": [],
  "details": "\nIt was discovered that the virtual terminal driver in the Linux kernel did\nnot properly handle VGA console font changes, leading to an out-of-bounds\nwrite. A local attacker could use this to cause a denial of service (system\ncrash) or possibly execute arbitrary code.\n\n",
  "id": "USN-5598-1",
  "modified": "2026-06-03T10:45:30Z",
  "published": "2022-09-05T22:10:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5598-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33656"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux-oracle vulnerability",
  "upstream": [
    "UBUNTU-CVE-2021-33656"
  ]
}



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