Vulnerability-Lookup

CVE-2021-4158 (GCVE-0-2021-4158)

Vulnerability from cvelistv5 – Published: 2022-08-24 15:10 – Updated: 2024-08-03 17:16

Summary

A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

Severity

6.0 (Medium)


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

CWE

CWE-476 - - NULL Pointer Dereference

Assigner

redhat redhat root

References

5 references

URL	Tags
https://gitlab.com/qemu-project/qemu/-/issues/770	x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=2035002	x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2021-4158	x_refsource_MISC
https://www.mail-archive.com/qemu-devel%40nongnu.…	x_refsource_MISC
https://gitlab.com/qemu-project/qemu/-/commit/9bd…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	QEMU	Affected: Affects v6.0.0 and above.

Show details on NVD website

JSON

To clipboard

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      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
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      "version": "32"
    },
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      "cve": "CVE-2021-4158",
      "id": "CVE-2021-4158",
      "initial_release_date": "2021-12-12T00:00:00+00:00",
      "product_status:fixed": "1052",
      "product_status:known_affected": "27",
      "product_status:known_not_affected": "37",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c",
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      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-13T23:58:26Z",
      "cve": "CVE-2021-4158",
      "id": "CVE-2021-4158",
      "initial_release_date": "2023-02-15T03:47:51Z",
      "product_status:known_not_affected": "1389",
      "product_status:recommended": "770",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-4158",
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}

RHSA-2022:7967

Vulnerability from csaf_redhat - Published: 2022-11-15 10:26 - Updated: 2026-06-28 09:11

Summary

Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2021-4158.

CVE-2021-4158

6.0 (Medium)


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

Fixed: 114 products

https://access.redhat.com/errata/RHSA-2022:7967

Open the full advisory

RHSA-2022_1759

Vulnerability from csaf_redhat - Published: 2022-05-10 13:24 - Updated: 2024-11-15 14:49

Summary

Red Hat Security Advisory: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update

Severity

Moderate

Scope

29 vulnerabilities in this advisory, including CVE-2021-4158.

CVE-2021-4158

6.0 (Medium)


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

Fixed: 940 products

https://access.redhat.com/errata/RHSA-2022:1759

Open the full advisory

RHSA-2022_7967

Vulnerability from csaf_redhat - Published: 2022-11-15 10:26 - Updated: 2024-11-15 12:03

Summary

Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2021-4158.

CVE-2021-4158

6.0 (Medium)


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

Fixed: 114 products

https://access.redhat.com/errata/RHSA-2022:7967

Open the full advisory

ubuntu-cve-2021-4158

Vulnerability from osv_ubuntu

Published

2021-12-24 00:00

Modified

2025-09-08 16:46

Summary

Details

Severity

6.0 (Medium)


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

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2021-4158	REPORT
	https://lists.nongnu.org/archive/html/qemu-devel/…	REPORT
	https://www.mail-archive.com/qemu-devel@nongnu.or…	REPORT
	https://ubuntu.com/security/notices/USN-5307-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-4158	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-common",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-data",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-gui",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-x86-microvm",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-system-x86-xen",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-user",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-user-static",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "1:6.2+dfsg-2ubuntu5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:6.2+dfsg-2ubuntu5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:6.0+dfsg-2expubuntu1",
        "1:6.0+dfsg-2expubuntu2",
        "1:6.0+dfsg-2expubuntu4"
      ]
    }
  ],
  "aliases": [],
  "details": "A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.",
  "id": "UBUNTU-CVE-2021-4158",
  "modified": "2025-09-08T16:46:52Z",
  "published": "2021-12-24T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-4158"
    },
    {
      "type": "REPORT",
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    {
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      "url": "https://www.mail-archive.com/qemu-devel@nongnu.org/msg857944.html"
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      "url": "https://ubuntu.com/security/notices/USN-5307-1"
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      "url": "https://www.cve.org/CVERecord?id=CVE-2021-4158"
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  ],
  "related": [
    "USN-5307-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-4158"
  ]
}

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-2021-4158 (GCVE-0-2021-4158)

RHSA-2022:7967

RHSA-2022_1759

RHSA-2022_7967

ubuntu-cve-2021-4158

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature