Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | >= 6.0.0, < 7.0.0 |
| Redhat | Enterprise Linux | 9.0 |
Related Weaknesses (CWE)
References
- 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/9bd6565ccee68f72d5012e24646e12a1c6PatchThird Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/770ExploitThird Party Advisory
- https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.htmlPatchThird Party Advisory
- 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/9bd6565ccee68f72d5012e24646e12a1c6PatchThird Party Advisory
- https://gitlab.com/qemu-project/qemu/-/issues/770ExploitThird Party Advisory
- https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.htmlPatchThird Party Advisory
FAQ
What is CVE-2021-4158?
CVE-2021-4158 is a vulnerability with a CVSS score of 6.0 (MEDIUM). 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 s...
How severe is CVE-2021-4158?
CVE-2021-4158 has been rated MEDIUM with a CVSS base score of 6.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-4158?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Redhat Enterprise Linux.