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CVE-2020-35503 Details

Description

A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=1910346	CVE	Issue TrackingThird Party Advisory
https://security.netapp.com/advisory/ntap-20210720-0008/	CVE	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1910346	[email protected]	Issue TrackingThird Party Advisory
https://security.netapp.com/advisory/ntap-20210720-0008/	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-476	NULL Pointer Dereference	[email protected]

Affected Products

Product	Versions
qemu qemu	<= 6.0.0
CPE cpe:2.3:a:qemu:qemu:::::::: Remediation No remediation found in references.
fedoraproject fedora	33
CPE cpe:2.3:o:fedoraproject:fedora:33:::::::* Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
May 13, 2022	Modified Analysis	[email protected]
Jul 20, 2021	CVE Modified	[email protected]
Jun 11, 2021	Initial Analysis	[email protected]