Medium severity · published Jun 2, 2021
CVE-2020-35503
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
6.0
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33 · source: NVD
QE
Qemu · Qemu
through 6.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35503
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-35503
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1910346
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210720-0008/
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