CVE-2021-4158
MEDIUM
6
CVSS Score
Published: August 24, 2022 at 03:10 PM UTC
Updated: June 17, 2026 at 04:19 AM UTC
2 products affected across 2 vendorsEnterprise LinuxQEMU
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Severity
MEDIUM6
Exploit prediction
EPSS 0.4%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≥ 6.0.06.0.0 ≤ v < 7.0.0
Affected range stops below 7.0.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (5)
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2021-4158x_refsource_MISCIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2035002x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827ex_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://gitlab.com/qemu-project/qemu/-/issues/770x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.htmlCVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-476
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