Vulnerability-Lookup

oesa-2022-1753

Vulnerability from osv_openeuler

Published

2022-07-15 11:05

Modified

2026-08-06 11:05

Summary

libsepol security update

Details

libsepol provides an API for the manipulation of SELinux binary policies. It is used by checkpolicy (the policy compiler) and similar tools, as well as by programs like load_policy that need to perform specific transformations on binary policies such as customizing policy boolean settings.

Security Fix(es):

The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).(CVE-2021-36086)

Severity

3.3 (Low)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-36086	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libsepol-debugsource-3.1-8.oe1.aarch64.rpm",
          "libsepol-debuginfo-3.1-8.oe1.aarch64.rpm",
          "libsepol-devel-3.1-8.oe1.aarch64.rpm",
          "libsepol-3.1-8.oe1.aarch64.rpm"
        ],
        "noarch": [
          "libsepol-help-3.1-8.oe1.noarch.rpm"
        ],
        "src": [
          "libsepol-3.1-8.oe1.src.rpm"
        ],
        "x86_64": [
          "libsepol-3.1-8.oe1.x86_64.rpm",
          "libsepol-devel-3.1-8.oe1.x86_64.rpm",
          "libsepol-debugsource-3.1-8.oe1.x86_64.rpm",
          "libsepol-debuginfo-3.1-8.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "libsepol",
        "purl": "pkg:rpm/openEuler/libsepol\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1-8.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "libsepol-3.1-8.oe1.aarch64.rpm",
          "libsepol-debuginfo-3.1-8.oe1.aarch64.rpm",
          "libsepol-devel-3.1-8.oe1.aarch64.rpm",
          "libsepol-debugsource-3.1-8.oe1.aarch64.rpm"
        ],
        "noarch": [
          "libsepol-help-3.1-8.oe1.noarch.rpm"
        ],
        "src": [
          "libsepol-3.1-8.oe1.src.rpm"
        ],
        "x86_64": [
          "libsepol-debugsource-3.1-8.oe1.x86_64.rpm",
          "libsepol-debuginfo-3.1-8.oe1.x86_64.rpm",
          "libsepol-devel-3.1-8.oe1.x86_64.rpm",
          "libsepol-3.1-8.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "libsepol",
        "purl": "pkg:rpm/openEuler/libsepol\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1-8.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Low"
  },
  "details": "libsepol provides an API for the manipulation of SELinux binary policies. It is used by checkpolicy (the policy compiler) and similar tools, as well as by programs like load_policy that need to perform specific transformations on binary policies such as customizing policy boolean settings.\r\n\r\nSecurity Fix(es):\r\n\r\nThe CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).(CVE-2021-36086)",
  "id": "OESA-2022-1753",
  "modified": "2026-08-06T11:05:01Z",
  "published": "2022-07-15T11:05:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1753"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-36086"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libsepol security update",
  "upstream": [
    "CVE-2021-36086"
  ]
}

CVE-2021-36086 (GCVE-0-2021-36086)

Vulnerability from cvelistv5 – Published: 2021-07-01 02:49 – Updated: 2025-11-03 21:44

Summary

The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

6 references

URL	Tags
https://github.com/google/oss-fuzz-vulns/blob/mai…	x_refsource_MISC
https://bugs.chromium.org/p/oss-fuzz/issues/detai…	x_refsource_MISC
https://github.com/SELinuxProject/selinux/commit/…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-2025020…
https://lists.debian.org/debian-lts-announce/2024…

Show details on NVD website

JSON

To clipboard

{
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      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T21:44:56.384Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
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              "x_transferred"
            ],
            "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yaml"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/SELinuxProject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8"
          },
          {
            "name": "FEDORA-2021-67efe88c29",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
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            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/"
          },
          {
            "url": "https://security.netapp.com/advisory/ntap-20250207-0004/"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list)."
        }
      ],
      "problemTypes": [
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          "descriptions": [
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            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2021-11-15T07:06:27.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
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        },
        {
          "tags": [
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          ],
          "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177"
        },
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          "url": "https://github.com/SELinuxProject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8"
        },
        {
          "name": "FEDORA-2021-67efe88c29",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-36086",
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        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
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        "data_version": "4.0",
        "description": {
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            }
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        "problemtype": {
          "problemtype_data": [
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        "references": {
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              "name": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yaml",
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              "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yaml"
            },
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  },
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    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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    "cveId": "CVE-2021-36086",
    "datePublished": "2021-07-01T02:49:37.000Z",
    "dateReserved": "2021-07-01T00:00:00.000Z",
    "dateUpdated": "2025-11-03T21:44:56.384Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

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.