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.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.5 / Impact : 6.0

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://access.redhat.com/security/cve/CVE-2021-3929	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2020298	Issue Tracking Patch Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385	Patch Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/556	Issue Tracking Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/782	Exploit Issue Tracking Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHNN7QJCEQH7AQG5AQP2GEFAQE6K635I/

Configurations

Configuration 1 (hide)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:35:::::::*
	cpe:2.3:o:fedoraproject:fedora:36:::::::*

History

No history.

Information

Published : 2022-08-25 20:15

Updated : 2023-11-07 03:38

NVD link : CVE-2021-3929

Mitre link : CVE-2021-3929

CVE.ORG link : CVE-2021-3929

JSON object : View

Products Affected

qemu

qemu

fedoraproject

fedora

CWE

CWE-416

Use After Free

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