Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2021-3929

Quick assessment

Affected
n/a QEMU
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 8.6 Difficulty: Moderate EPSS 0.67% · P49
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-3929

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
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 POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-3929

请登录查看更多情报信息。

Patches & Fixes for CVE-2021-3929 (1)

Vendor Advisories for CVE-2021-3929 (2)

Mailing List Discussions for CVE-2021-3929 (1)

Other References for CVE-2021-3929 (2)

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 → →

IV. Related Vulnerabilities

Same product: QEMU
Same vendor: n/a
Same weakness: CWE-416

V. Comments for CVE-2021-3929

No comments yet

Leave a comment