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CVE-2021-4158

Date: August 24, 2022

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.

Language: C

Severity Score

Related Resources (12)

https://people.canonical.com/~ubuntu-security/cve/CVE-2021-4158
https://access.redhat.com/errata/RHSA-2022:1759
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html
https://gitlab.com/qemu-project/qemu/-/issues/770
https://www.mail-archive.com/qemu-devel@nongnu.org/msg857944.html
https://access.redhat.com/errata/RHSA-2022:7967
https://nvd.nist.gov/vuln/detail/CVE-2021-4158
https://bugzilla.redhat.com/show_bug.cgi?id=2035002
https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e
https://access.redhat.com/security/cve/CVE-2021-4158
https://security-tracker.debian.org/tracker/CVE-2021-4158
https://www.mend.io/vulnerability-database/CVE-2021-4158

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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