Home/CVE/A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could
CVE

CVE-2021-4158

A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could

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.

MEDIUM · CVSS 6 EPSS 0.00024
Schedule remediation
  • Public exploit or PoC is available
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

2
qemu>= 6.0.0 and < 7.0.0
redhat enterprise linuxall versions
⚠

Public Exploits & PoCs

1
pocgitlab.com · issues/770gitlab.com
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPotentially Suspicious Usage Of Qemu
▣

Scoring & Timeline

6
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD24 Aug 2022 · 04:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
⚑

Vendor Advisories

5
msrcCVE-2021-4158
suse-csafopenSUSE-SU-2024:11862-1
usnUSN-5307-1
rhsaRHSA-2022:1759Moderate
rhsaRHSA-2022:7967Low
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2021-4158Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2035002Issue TrackingPatchThird Party Advisory
https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827ePatchThird Party Advisory
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.htmlPatchThird Party Advisory
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