CVE-2020-35503

Severity: medium (CVSS 6.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-02 · updated 2026-06-17
Weakness: CWE-476

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.

Affected products

Fedoraproject Fedora: 33
QEMU: through 6.0.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1910346
https://security.netapp.com/advisory/ntap-20210720-0008/
https://bugzilla.redhat.com/show_bug.cgi?id=1910346
https://security.netapp.com/advisory/ntap-20210720-0008/

Get alerted when CVE-2020-35503 or the next vulnerability affects your stack