CVE-2021-33656 (GCVE-0-2021-33656)

Vulnerability from cvelistv5 – Published: 2022-07-18 14:44 – Updated: 2024-08-03 23:58
VLAI
Summary
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
CWE
Impacted products
Vendor Product Version CPE status
n/a openEuler:kernel Affected: <5.10.127
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:58:21.558Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel"
          },
          {
            "name": "[oss-security] 20220719 CVE-2021-33656: Linux kernel: When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.(\u003c5.10.127)",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/07/19/3"
          },
          {
            "name": "[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "openEuler:kernel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c5.10.127"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-02T18:06:13.000Z",
        "orgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
        "shortName": "openEuler"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel"
        },
        {
          "name": "[oss-security] 20220719 CVE-2021-33656: Linux kernel: When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.(\u003c5.10.127)",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/07/19/3"
        },
        {
          "name": "[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "securities@openeuler.org",
          "ID": "CVE-2021-33656",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "openEuler:kernel",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c5.10.127"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-787 Out-of-bounds Write"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch",
              "refsource": "MISC",
              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch"
            },
            {
              "name": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel",
              "refsource": "MISC",
              "url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel"
            },
            {
              "name": "[oss-security] 20220719 CVE-2021-33656: Linux kernel: When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.(\u003c5.10.127)",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2022/07/19/3"
            },
            {
              "name": "[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2",
    "assignerShortName": "openEuler",
    "cveId": "CVE-2021-33656",
    "datePublished": "2022-07-18T14:44:28.000Z",
    "dateReserved": "2021-05-28T00:00:00.000Z",
    "dateUpdated": "2024-08-03T23:58:21.558Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-33656",
      "date": "2026-09-22",
      "epss": "0.00611",
      "percentile": "0.47934"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:huawei:openeuler:20.03:-:*:*:lts:*:*:*",
                  "matchCriteriaId": "14A33B05-1F3B-457A-9136-3CAD433FDEBA",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:huawei:openeuler:20.03:sp1:*:*:lts:*:*:*",
                  "matchCriteriaId": "78AA9487-C85C-4F4F-9429-E0496080F7B5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:huawei:openeuler:20.03:sp3:*:*:lts:*:*:*",
                  "matchCriteriaId": "2E9E5CF1-3FD7-413A-BD29-0EBA0E1E6766",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        },
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "0F459694-1B3F-472F-88F7-6E97AD3958DD",
                  "versionEndExcluding": "5.10.127",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        },
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                  "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds."
        },
        {
          "lang": "es",
          "value": "Cuando es establecida la fuente con datos maliciosos por ioctl cmd PIO_FONT, el kernel escribir\u00e1 memoria fuera de l\u00edmites"
        }
      ],
      "id": "CVE-2021-33656",
      "lastModified": "2024-11-21T06:09:17.573",
      "metrics": {
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "PHYSICAL",
              "availabilityImpact": "HIGH",
              "baseScore": 6.8,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "exploitabilityScore": 0.9,
            "impactScore": 5.9,
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      },
      "published": "2022-07-18T15:15:08.043",
      "references": [
        {
          "source": "securities@openeuler.org",
          "tags": [
            "Mailing List",
            "Patch",
            "Third Party Advisory"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/07/19/3"
        },
        {
          "source": "securities@openeuler.org",
          "tags": [
            "Patch",
            "Third Party Advisory"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch"
        },
        {
          "source": "securities@openeuler.org",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
        },
        {
          "source": "securities@openeuler.org",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Mailing List",
            "Patch",
            "Third Party Advisory"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/07/19/3"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch",
            "Third Party Advisory"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel"
        }
      ],
      "sourceIdentifier": "securities@openeuler.org",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-787"
            }
          ],
          "source": "securities@openeuler.org",
          "type": "Secondary"
        },
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-787"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "microsoft_vex": {
      "current_release_date": "2022-07-29T00:00:00.000Z",
      "cve": "CVE-2021-33656",
      "id": "msrc_CVE-2021-33656",
      "initial_release_date": "2022-07-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "When setting font with malicous data by ioctl cmd PIO_FONTkernel will write memory out of bounds.",
      "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2021-33656.json",
      "version": "1"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:openatom:openeuler:20.03:-:*:*:lts:*:*:*",
                    "matchCriteriaId": "E438DADF-863B-4CE2-BDA4-468E41809BDB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:openatom:openeuler:20.03:sp1:*:*:lts:*:*:*",
                    "matchCriteriaId": "464D2E5A-0D36-4893-85A4-2267AE0333DE",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:openatom:openeuler:20.03:sp3:*:*:lts:*:*:*",
                    "matchCriteriaId": "A98D36A4-869D-4F90-9434-599915671828",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "0F459694-1B3F-472F-88F7-6E97AD3958DD",
                    "versionEndExcluding": "5.10.127",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds."
          },
          {
            "lang": "es",
            "value": "Cuando es establecida la fuente con datos maliciosos por ioctl cmd PIO_FONT, el kernel escribir\u00e1 memoria fuera de l\u00edmites"
          }
        ],
        "id": "CVE-2021-33656",
        "lastModified": "2025-04-02T18:33:53.340",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "PHYSICAL",
                "availabilityImpact": "HIGH",
                "baseScore": 6.8,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 0.9,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2022-07-18T15:15:08.043",
        "references": [
          {
            "source": "securities@openeuler.org",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/07/19/3"
          },
          {
            "source": "securities@openeuler.org",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch"
          },
          {
            "source": "securities@openeuler.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
          },
          {
            "source": "securities@openeuler.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/07/19/3"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656\u0026packageName=kernel"
          }
        ],
        "sourceIdentifier": "securities@openeuler.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "securities@openeuler.org",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:27:37+00:00",
      "cve": "CVE-2021-33656",
      "id": "CVE-2021-33656",
      "initial_release_date": "2021-01-05T10:00:00+00:00",
      "product_status:fixed": "279",
      "product_status:known_affected": "148",
      "product_status:known_not_affected": "2",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: when setting font with malicious data by ioctl PIO_FONT, kernel will write memory out of bounds",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-33656.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:41:12Z",
      "cve": "CVE-2021-33656",
      "id": "CVE-2021-33656",
      "initial_release_date": "2023-02-15T03:40:18Z",
      "product_status:known_affected": "368",
      "product_status:known_not_affected": "63",
      "product_status:recommended": "888",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-33656",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-33656.json",
      "version": "46"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Loading…

Loading…

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


Loading…