CVE-2021-3392

low-risk
Published 2021-03-23

A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.2/10 Low
LOCAL / LOW complexity

Affected Products (4)

Affected Vendors

Debian Fedoraproject Qemu

References (10)

Exploit https://bugs.launchpad.net/qemu/+bug/1914236
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1924042
Third Party Advisory https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
Mailing List https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20210507-0001/
Exploit https://bugs.launchpad.net/qemu/+bug/1914236
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1924042
Third Party Advisory https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
Mailing List https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20210507-0001/
22
/ 100
low-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 10/34 · Low