PT-2021-23345 · Qemu+7 · Qemu+7

Mauro Matteo Cascella · Published 2021-12-12 · Updated 2024-06-15 · CVE-2021-4158

Positive Technologies (AI Summary)

CVSS v3.1

6.0

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions QEMU (affected versions not specified)

Description 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALSA-2022:1759

ALSA-2022:7967

ALT-PU-2022-1369

ALT-PU-2022-1412

ALT-PU-2022-2009

ALT-PU-2022-2062

ALT-PU-2023-1830

ALT-PU-2023-1869

AZL-10679

AZL-35153

CESA-2022_1759

CVE-2021-4158

OESA-2022-1772

OPENSUSE-SU-2024:11862-1

RHSA-2022:1759

RHSA-2022:7967

RHSA-2022_1759

RHSA-2022_7967

RLSA-2022:1759

RLSA-2022:7967

USN-5307-1

Affected Products

Alt Linux

Almalinux

Centos

Linuxmint

Qemu

Red Hat

Rocky Linux

Ubuntu

References · 260

• 🔥 https://gitlab.com/qemu-project/qemu/-/issues/770 · Exploit
• https://errata.almalinux.org/9/ALSA-2022-7967.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-4158 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-4158 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3546 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2022-1759.html · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2022:1759 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2022-9172.html · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2022-9123.html · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2022:7967 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-4158 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2035002 · Patch
• https://security-tracker.debian.org/tracker/CVE-2021-4158 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2022-1759.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-4158 · Vendor Advisory