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CVE-2021-3750

Quick assessment

Affected
n/a QEMU
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 7.0.0 版本之前存在资源管理错误漏洞，该漏洞源于 EHCI 在传输 USB 数据包时不会验证缓冲区指针是否与其 MMIO 区域重叠。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.51% · P42
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I. Basic Information for CVE-2021-3750

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead 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 execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.
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 7.0.0 版本之前存在资源管理错误漏洞，该漏洞源于 EHCI 在传输 USB 数据包时不会验证缓冲区指针是否与其 MMIO 区域重叠。
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 QEMU before version 7.0.0 -

II. Public POCs for CVE-2021-3750

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III. Intelligence Information for CVE-2021-3750

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Vendor Advisories for CVE-2021-3750 (3)

Other References for CVE-2021-3750 (2)

Same Patch Batch · n/a · 2022-05-02 · 23 CVEs total

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CVE-2021-46790 Tuxera NTFS-3G 缓冲区错误漏洞
CVE-2022-29973 relan exFAT 安全漏洞
CVE-2022-29969 MediaWiki 跨站脚本漏洞

Showing top 20 of 23 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-3750

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