| CVE-2021-3929 | Date: (C)2022-07-08 (M)2024-04-26 |
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 Score and Metrics +CVSS Score and Metrics -| CVSS V3 Severity: | CVSS V2 Severity: |
| CVSS Score : 8.2 | CVSS Score : |
| Exploit Score: 1.5 | Exploit Score: |
| Impact Score: 6.0 | Impact Score: |
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| CVSS V3 Metrics: | CVSS V2 Metrics: |
| Attack Vector: LOCAL | Access Vector: |
| Attack Complexity: LOW | Access Complexity: |
| Privileges Required: HIGH | Authentication: |
| User Interaction: NONE | Confidentiality: |
| Scope: CHANGED | Integrity: |
| Confidentiality: HIGH | Availability: |
| Integrity: HIGH | |
| Availability: HIGH | |
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