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 v3.1

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

EPSS

0.67% chance of exploitation in the next 30 days, 50th percentile

Published

2022-08-25

Updated

2025-02-28

Proof-of-concept exploits (1)

• QiuhaoLi/CVE-2021-3929-3947170★ · 2022-05-13

References

• CVE Record
• NVD entry

Related

• CVE-2021-39289
• CVE-2021-39290
• CVE-2021-39285
• CVE-2021-39291
• CVE-2021-39283
• CVE-2021-39295