Published: 23/03/2021 Updated: 30/09/2022

CVSS v2 Base Score: 2.1 | Impact Score: 2.9 | Exploitability Score: 3.9

CVSS v3 Base Score: 3.2 | Impact Score: 1.4 | Exploitability Score: 1.5

VMScore: 187

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

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.

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qemu qemu
fedoraproject fedora 33
debian debian linux 9.0
debian debian linux 10.0

Debian Bug report logs - #984449 CVE-2021-3392 Package: qemu; Maintainer for qemu is Debian QEMU Team <pkg-qemu-devel@listsaliothdebianorg>; Source for qemu is src:qemu (PTS, buildd, popcon) Reported by: Moritz Muehlenhoff <jmm@debianorg> Date: Wed, 3 Mar 2021 19:21:01 UTC Severity: important Tags: security, up ...

A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device 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 th ...

A use-after-free issue was found in the Megaraid emulator of the QEMU It occurs while processing SCSI I/O requests because in case of an error mptsas_free_request() does not dequeue request object 'req' from a pending requests' queue Which later gets processed resulting in the said use-after-free issue A privileged guest user may use this flaw t ...

CWE-416 CWE-416 https://bugzilla.redhat.com/show_bug.cgi?id=1924042 https://bugs.launchpad.net/qemu/+bug/1914236 https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html https://security.netapp.com/advisory/ntap-20210507-0001/https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984449 https://nvd.nist.gov https://alas.aws.amazon.com/AL2/ALAS-2023-2061.html

CVE-2021-3392

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