Vulnerability-Lookup

CVE-2021-36084 (GCVE-0-2021-36084)

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_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).

Severity

3.3 (Low)


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

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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    "datePublished": "2021-07-01T02:49:01.000Z",
    "dateReserved": "2021-07-01T00:00:00.000Z",
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    "epss": {
      "cve": "CVE-2021-36084",
      "date": "2026-09-15",
      "epss": "0.00485",
      "percentile": "0.40419"
    },
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      "lastModified": "2024-11-21T06:13:07.110",
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      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
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    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T10:24:14+00:00",
      "cve": "CVE-2021-36084",
      "id": "CVE-2021-36084",
      "initial_release_date": "2021-04-19T00:00:00+00:00",
      "product_status:fixed": "52",
      "product_status:known_affected": "3",
      "product_status:known_not_affected": "7",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "libsepol: use-after-free in __cil_verify_classperms()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-36084.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-07-25T17:39:57Z",
      "cve": "CVE-2021-36084",
      "id": "CVE-2021-36084",
      "initial_release_date": "2023-02-15T03:39:50Z",
      "product_status:known_not_affected": "182",
      "product_status:recommended": "3",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-36084",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-36084.json",
      "version": "14"
    }
  }
}

ICSA-23-348-10

Vulnerability from csaf_cisa - Published: 2023-12-12 00:00 - Updated: 2025-08-12 00:00

Summary

Siemens SIMATIC S7-1500

Scope

544 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

3.3 (Low)


                
                  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Known affected: 5 products

https://support.industry.siemens.com/cs/ww/en/view/109478459/

Open the full advisory

NCSC-2025-0382

Vulnerability from csaf_ncscnl - Published: 2025-12-09 13:15 - Updated: 2025-12-09 13:15

Summary

Kwetsbaarheden verholpen in Siemens producten

Scope

124 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

Red Hat Enterprise Linux and SELinux versions up to 3.2 have multiple vulnerabilities, including use-after-free and Denial of Service risks, potentially allowing attackers to execute arbitrary code or cause service disruptions.

3.3 (Low)


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

Known affected: 32 products

Open the full advisory

RHSA-2021:4513

Vulnerability from csaf_redhat - Published: 2021-11-09 18:30 - Updated: 2026-06-25 10:59

Summary

Red Hat Security Advisory: libsepol security update

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).

3.3 (Low)


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

Fixed: 36 products

https://access.redhat.com/errata/RHSA-2021:4513

Open the full advisory

RHSA-2021_4513

Vulnerability from csaf_redhat - Published: 2021-11-09 18:30 - Updated: 2024-11-22 17:25

Summary

Red Hat Security Advisory: libsepol security update

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).

3.3 (Low)


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

Fixed: 52 products

https://access.redhat.com/errata/RHSA-2021:4513

Open the full advisory

SSA-202008

Vulnerability from csaf_siemens - Published: 2025-12-09 00:00 - Updated: 2025-12-09 00:00

Summary

SSA-202008: Multiple Vulnerabilities in Ruggedcom Rox Before V2.17.0

Scope

83 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

3.3 (Low)


                
                  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Known affected: 11 products

https://support.industry.siemens.com/cs/ww/en/view/109997648/

Open the full advisory

SSA-398330

Vulnerability from csaf_siemens - Published: 2023-12-12 00:00 - Updated: 2025-08-12 00:00

Summary

SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5

Scope

544 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

3.3 (Low)


                
                  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Known affected: 5 products

https://support.industry.siemens.com/cs/ww/en/view/109478459/

Open the full advisory

ubuntu-cve-2021-36084

Vulnerability from osv_ubuntu

Published

2021-07-01 03:15

Modified

2026-04-22 07:40

Summary

Details

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).

Severity

3.3 (Low)


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

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2021-36084	REPORT
	https://github.com/google/oss-fuzz-vulns/blob/mai…	REPORT
	https://ubuntu.com/security/notices/USN-5391-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-36084	REPORT

JSON

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{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libsepol1",
            "binary_version": "2.4-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "sepol-utils",
            "binary_version": "2.4-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libsepol",
        "purl": "pkg:deb/ubuntu/libsepol@2.4-2ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4-2ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3-2",
        "2.4-2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libsepol1",
            "binary_version": "2.7-1ubuntu0.1"
          },
          {
            "binary_name": "sepol-utils",
            "binary_version": "2.7-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libsepol",
        "purl": "pkg:deb/ubuntu/libsepol@2.7-1ubuntu0.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libsepol1",
            "binary_version": "3.0-1ubuntu0.1"
          },
          {
            "binary_name": "sepol-utils",
            "binary_version": "3.0-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libsepol",
        "purl": "pkg:deb/ubuntu/libsepol@3.0-1ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.9-2",
        "3.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).",
  "id": "UBUNTU-CVE-2021-36084",
  "modified": "2026-04-22T07:40:06Z",
  "published": "2021-07-01T03:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-36084"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-417.yaml"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5391-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-36084"
    }
  ],
  "related": [
    "USN-5391-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-36084"
  ]
}

WID-SEC-W-2022-0571

Vulnerability from csaf_certbund - Published: 2021-11-09 23:00 - Updated: 2025-01-15 23:00

Summary

Red Hat Enterprise Linux: Mehrere Schwachstellen

Severity

Hoch

Scope

25 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

In Red Hat Enterprise Linux existieren mehrere Schwachstellen. Die Fehler existieren in den Komponenten python-lxml, qt5, python-babel, container-tools:2.0, container-tools:3.0, tcpdump, rust-toolset, libjpeg-turbo, zziplib, linuxptp, file, json-c, libsolv, tpm2-tools, ncurses, python-pip, dnf, dnf-plugins-core, libdnf, lua, libsepol und autotrace. Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann diese Schwachstellen ausnutzen, um einen Cross-Site-Scripting-Angriff durchzuführen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand herbeizuführen, Sicherheitsmaßnahmen zu umgehen, beliebigen Code auszuführen, Dateien zu manipulieren und einen nicht spezifizierten Angriff durchzuführen. Die erfolgreiche Ausnutzung einiger dieser Schwachstellen erfordert eine Benutzerinteraktion und erhöhte Rechte.

Known affected: 12 products

Open the full advisory

WID-SEC-W-2025-0300

Vulnerability from csaf_certbund - Published: 2025-02-09 23:00 - Updated: 2025-02-09 23:00

Summary

NetApp ActiveIQ Unified Manager: Mehrere Schwachstellen ermöglichen Denial of Service

Severity

Niedrig

Scope

4 vulnerabilities in this advisory, including CVE-2021-36084.

CVE-2021-36084

Es gibt mehrere Schwachstellen in NetApp ActiveIQ Unified Manager, die derzeit noch nicht ausführlich beschrieben und veröffentlicht wurden. Ein lokaler Angreifer kann diese Schwachstellen ausnutzen, um eine Denial-of-Service-Zustand zu erzeugen. Einige der Schwachstellen erfordern ein bestimmtes Maß an Berechtigungen oder Benutzerinteraktion, um erfolgreich ausgenutzt werden zu können.

Known affected: 1 product

Open the full advisory

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.

Action not permitted

CVE-2021-36084 (GCVE-0-2021-36084)

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature