CVE-2021-4158

Public Exploit

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.

Category

6.0
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Third-Party Advisory redhat.com Third-Party Advisory redhat.com Third-Party Advisory gitlab.com Third-Party Advisory gitlab.com Third-Party Advisory mail-archive.com
Affected: n/a QEMU
Published at:
Updated at:

References

Link Tags
https://gitlab.com/qemu-project/qemu/-/issues/770 third party advisory exploit
https://bugzilla.redhat.com/show_bug.cgi?id=2035002 issue tracking third party advisory patch
https://access.redhat.com/security/cve/CVE-2021-4158 third party advisory
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html third party advisory patch
https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-4158?
CVE-2021-4158 has been scored as a medium severity vulnerability.
How to fix CVE-2021-4158?
To fix CVE-2021-4158, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4158 being actively exploited in the wild?
It is possible that CVE-2021-4158 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4158?
CVE-2021-4158 affects n/a QEMU.
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