CVE-2021-3929

 

Published at: - 25-08-2022 10:15

Last modified: - 23-09-2022 05:15

Total changes: - 5

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://gitlab.com/qemu-project/qemu/-/commit/736b01642d85be832385
• https://bugzilla.redhat.com/show_bug.cgi?id=2020298
• https://gitlab.com/qemu-project/qemu/-/issues/556
• https://access.redhat.com/security/cve/CVE-2021-3929
• https://gitlab.com/qemu-project/qemu/-/issues/782
• FEDORA-2022-f0a2695054-

 

Keywords

NVD

 

CVE-2021-3929

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures