usn-5591-3
Vulnerability from osv_ubuntu
Published
2022-09-01 17:51
Modified
2026-06-03 10:45
Summary
linux, linux-azure-4.15, linux-dell300x, linux-gcp-4.15, linux-kvm, linux-snapdragon 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 

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    }
  ],
  "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",
  "id": "USN-5591-3",
  "modified": "2026-06-03T10:45:29Z",
  "published": "2022-09-01T17:51:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5591-3"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33656"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "linux, linux-azure-4.15, linux-dell300x, linux-gcp-4.15, linux-kvm, linux-snapdragon vulnerability",
  "upstream": [
    "UBUNTU-CVE-2021-33656"
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.