CVE-2021-3929
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I. Basic Information for CVE-2021-3929
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
QEMU 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QEMU（Quick Emulator）是法国法布里斯-贝拉（Fabrice Bellard）个人开发者的一套模拟处理器软件。该软件具有速度快、跨平台等特点。 QEMU 中的 NVM Express 控制器 (NVME) 仿真中存在安全漏洞，该漏洞源于当可重入写入触发重置函数 nvme_ctrl_reset() 时，数据结构将被释放，从而导致释放后使用问题。恶意来宾可以利用此缺陷使主机上的 QEMU 进程崩溃，从而导致拒绝服务条件，或者可能在主机上的 QEMU 进程上下文中执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | QEMU | Fixed in qemu-kvm 7.0.0-rc0 | - |
II. Public POCs for CVE-2021-3929
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | Recursive MMIO VM Escape PoC | https://github.com/QiuhaoLi/CVE-2021-3929-3947 | POC Details |
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-3929
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- https://bugzilla.redhat.com/show_bug.cgi?id=2020298x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2021-3929x_refsource_MISC
- https://gitlab.com/qemu-project/qemu/-/issues/782x_refsource_MISC
- https://gitlab.com/qemu-project/qemu/-/issues/556x_refsource_MISC
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XHNN7QJCEQH7AQG5AQP2GEFAQE6K635I/vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2021-3929
Same Patch Batch · n/a · 2022-08-25 · 214 CVEs total
| CVE-2022-37317 | 7.6 HIGH | Archer Platform 跨站脚本漏洞 |
| CVE-2022-37318 | 7.0 HIGH | Archer Platform 跨站脚本漏洞 |
| CVE-2022-37316 | 6.5 MEDIUM | Archer Platform 安全漏洞 |
| CVE-2022-37241 | Alt-N MDaemon 跨站脚本漏洞 | |
| CVE-2022-37815 | Tenda AC1206 缓冲区错误漏洞 | |
| CVE-2022-37817 | Tenda AX1803 缓冲区错误漏洞 | |
| CVE-2022-37824 | Tenda AX1803 缓冲区错误漏洞 | |
| CVE-2022-37814 | Tenda AC1206 缓冲区错误漏洞 | |
| CVE-2022-37820 | Tenda AX1803 缓冲区错误漏洞 | |
| CVE-2022-37816 | Tenda AC1206 缓冲区错误漏洞 | |
| CVE-2022-37822 | Tenda AX1803 缓冲区错误漏洞 | |
| CVE-2022-37245 | Alt-N MDaemon 跨站脚本漏洞 | |
| CVE-2022-37244 | Alt-N MDaemon 跨站脚本漏洞 | |
| CVE-2022-37243 | Alt-N MDaemon 跨站脚本漏洞 | |
| CVE-2022-37242 | Alt-N MDaemon 注入漏洞 | |
| CVE-2022-23235 | Netapp Active IQ Unified Manager 信息泄露漏洞 | |
| CVE-2022-37159 | Claroline 代码问题漏洞 | |
| CVE-2022-37160 | Claroline 跨站脚本漏洞 | |
| CVE-2022-2991 | Linux kernel 缓冲区错误漏洞 | |
| CVE-2022-37161 | Claroline 跨站脚本漏洞 |
Showing top 20 of 214 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-3929
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