Vulnerability-Lookup

OESA-2022-1920 (CVE-2021-3782)

Vulnerability from osv_openeuler – Published: 2022-09-16 11:05 – Updated: 2026-08-06 11:05 – Source website

Summary

wayland security update

Details

Wayland is a protocol for a compositor to talk to its clients as well as a C library implementation of that protocol. The compositor can be a standalone display server running on Linux kernel modesetting and evdev input devices, an X application, or a wayland client itself. The clients can be traditional applications, X servers (rootless or fullscreen) or other display servers. Part of the Wayland project is also the Weston reference implementation of a Wayland compositor. Weston can run as an X client or under Linux KMS and ships with a few demo clients. The Weston compositor is a minimal and fast compositor and is suitable for many embedded and mobile use cases.

Security Fix(es):

An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time.(CVE-2021-3782)

Severity

6.6 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-3782	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "wayland-debuginfo-1.17.0-3.oe1.aarch64.rpm",
          "wayland-debugsource-1.17.0-3.oe1.aarch64.rpm",
          "wayland-devel-1.17.0-3.oe1.aarch64.rpm",
          "wayland-1.17.0-3.oe1.aarch64.rpm"
        ],
        "noarch": [
          "wayland-help-1.17.0-3.oe1.noarch.rpm"
        ],
        "src": [
          "wayland-1.17.0-3.oe1.src.rpm"
        ],
        "x86_64": [
          "wayland-debuginfo-1.17.0-3.oe1.x86_64.rpm",
          "wayland-devel-1.17.0-3.oe1.x86_64.rpm",
          "wayland-debugsource-1.17.0-3.oe1.x86_64.rpm",
          "wayland-1.17.0-3.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "wayland",
        "purl": "pkg:rpm/openEuler/wayland\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17.0-3.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "wayland-1.17.0-3.oe1.aarch64.rpm",
          "wayland-devel-1.17.0-3.oe1.aarch64.rpm",
          "wayland-debugsource-1.17.0-3.oe1.aarch64.rpm",
          "wayland-debuginfo-1.17.0-3.oe1.aarch64.rpm"
        ],
        "noarch": [
          "wayland-help-1.17.0-3.oe1.noarch.rpm"
        ],
        "src": [
          "wayland-1.17.0-3.oe1.src.rpm"
        ],
        "x86_64": [
          "wayland-devel-1.17.0-3.oe1.x86_64.rpm",
          "wayland-1.17.0-3.oe1.x86_64.rpm",
          "wayland-debugsource-1.17.0-3.oe1.x86_64.rpm",
          "wayland-debuginfo-1.17.0-3.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "wayland",
        "purl": "pkg:rpm/openEuler/wayland\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17.0-3.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "wayland-debuginfo-1.19.91-4.oe2203.aarch64.rpm",
          "wayland-1.19.91-4.oe2203.aarch64.rpm",
          "wayland-devel-1.19.91-4.oe2203.aarch64.rpm",
          "wayland-debugsource-1.19.91-4.oe2203.aarch64.rpm"
        ],
        "noarch": [
          "wayland-help-1.19.91-4.oe2203.noarch.rpm"
        ],
        "src": [
          "wayland-1.19.91-4.oe2203.src.rpm"
        ],
        "x86_64": [
          "wayland-devel-1.19.91-4.oe2203.x86_64.rpm",
          "wayland-1.19.91-4.oe2203.x86_64.rpm",
          "wayland-debuginfo-1.19.91-4.oe2203.x86_64.rpm",
          "wayland-debugsource-1.19.91-4.oe2203.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "wayland",
        "purl": "pkg:rpm/openEuler/wayland\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.19.91-4.oe2203"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Wayland is a protocol for a compositor to talk to its clients as well as a C library implementation of that protocol. The compositor can be a standalone display server running on Linux kernel modesetting and evdev input devices, an X application, or a wayland client itself. The clients can be traditional applications, X servers (rootless or fullscreen) or other display servers. Part of the Wayland project is also the Weston reference implementation of a Wayland compositor. Weston can run as an X client or under Linux KMS and ships with a few demo clients. The Weston compositor is a minimal and fast compositor and is suitable for many embedded and mobile use cases.\r\n\r\nSecurity Fix(es):\r\n\r\nAn internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time.(CVE-2021-3782)",
  "id": "OESA-2022-1920",
  "modified": "2026-08-06T11:05:14Z",
  "published": "2022-09-16T11:05:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1920"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3782"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "wayland security update",
  "upstream": [
    "CVE-2021-3782"
  ]
}

CVE-2021-3782 (GCVE-0-2021-3782)

Vulnerability from cvelistv5 – Published: 2022-09-23 15:26 – Updated: 2025-05-22 18:21

Summary

Severity

6.6 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-22 18:20 UTC

CWE

CWE-190 - (CWE-190|CWE-911)->CWE-416

Assigner

redhat redhat root Scorecard

References

1 reference

URL	Tags
https://gitlab.freedesktop.org/wayland/wayland/-/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	wayland	Affected: wayland 1.20.91

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:09:08.931Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://gitlab.freedesktop.org/wayland/wayland/-/issues/224"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 6.6,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-3782",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-22T18:20:59.707899Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-22T18:21:26.824Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "wayland",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "wayland 1.20.91"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
              "description": "(CWE-190|CWE-911)-\u003eCWE-416",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-09-23T15:26:59.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://gitlab.freedesktop.org/wayland/wayland/-/issues/224"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2021-3782",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "wayland",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "wayland 1.20.91"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "(CWE-190|CWE-911)-\u003eCWE-416"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://gitlab.freedesktop.org/wayland/wayland/-/issues/224",
              "refsource": "MISC",
              "url": "https://gitlab.freedesktop.org/wayland/wayland/-/issues/224"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-3782",
    "datePublished": "2022-09-23T15:26:59.000Z",
    "dateReserved": "2021-09-09T00:00:00.000Z",
    "dateUpdated": "2025-05-22T18:21:26.824Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

OESA-2022-1920 (CVE-2021-3782)

CVE-2021-3782 (GCVE-0-2021-3782)

Tags

Sightings

Nomenclature

Related by attack behaviour