CVE Vulnerability

CVE-2021-3929

A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition or, potentially, executing arbitrary code within the context of the QEMU process on the host.

8.2 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.5 / Impact : 6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385 Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2020298 Issue Tracking Patch
https://gitlab.com/qemu-project/qemu/-/issues/556 Issue Tracking Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3929 Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/782 Exploit Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XHNN7QJCEQH7AQG5AQP2GEFAQE6K635I/ Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
Information

Published : 2022-08-25 08:15

Updated : 2022-10-01 02:28

NVD link : CVE-2021-3929

Mitre link : CVE-2021-3929

Products Affected
No products.
CWE
CWE-416