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CVE-2021-4158
Component Overview
Vulnerability Overview
Name
CVE-2021-4158
Source
NVD (
link
)
Debian (
link
)
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.
CWEs
CWE-476
CWE-476
Published Date
Aug 24, 2022
Updated Date
Jun 17, 2026
Workaround
-
Advisories
https://access.redhat.com/security/cve/CVE-2021-4158
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2035002
Issue Tracking
https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e
Patch
https://gitlab.com/qemu-project/qemu/-/issues/770
Exploit
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html
Patch
https://access.redhat.com/security/cve/CVE-2021-4158
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2035002
Issue Tracking
https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e
Patch
https://gitlab.com/qemu-project/qemu/-/issues/770
Exploit
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html
Patch
Analysis
#
Affected Component
Analysis
qemu
Patched
Vulnerability Rating
#
6
CVSSv31
Others affected components
#
Name
Project
Project Version
Version
Status
qemu
buildroot
2025.02.x
9.2.0
Not Affected
qemu
buildroot
master
11.0.0
Not Affected
qemu
openwrt
master
10.1.3-r2
Not Affected
qemu
openwrt
openwrt-25.12
10.1.2-r1
Not Affected
qemu
yocto
master
11.0.1
Not Affected
qemu
yocto
scarthgap
8.2.7
Not Affected
Resolved with patches
#
qemu (yocto:kirkstone)
#
Title
Author
Resolve
1
acpi: validate hotplug selector on access
"Michael S. Tsirkin" <mst@redhat.com>
CVE-2021-4158