CVE-2021-20181
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2021-20181
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View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: NVD (National Vulnerability Database)
Vulnerability Description
A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: NVD (National Vulnerability Database)
Vulnerability Title
QEMU 竞争条件问题漏洞
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 guest system 存在安全漏洞，攻击者可利用该漏洞通过VirtFS目录共享触发致命错误，从而在主机系统上触发拒绝服务.
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 | up to, including 5.2.0 | - |
II. Public POCs for CVE-2021-20181
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-20181
请登录查看更多情报信息。
Vendor Advisories for CVE-2021-20181 (3)
- https://bugzilla.redhat.com/show_bug.cgi?id=1927007x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20210720-0009/x_refsource_CONFIRM
- https://www.zerodayinitiative.com/advisories/ZDI-21-159/x_refsource_MISC
Mailing List Discussions for CVE-2021-20181 (2)
Same Patch Batch · n/a · 2021-05-13 · 36 CVEs total
| CVE-2021-23909 | 6.3 MEDIUM | Mercedes Benz HERMES E Series 缓冲区错误漏洞 |
| CVE-2021-23910 | 5.3 MEDIUM | Mercedes Benz HERMES 缓冲区错误漏洞 |
| CVE-2021-23908 | 2.9 LOW | Mercedes-Benz AG MBUX Infotainment System 安全漏洞 |
| CVE-2021-23907 | 2.9 LOW | Mercedes-Benz AG MBUX Infotainment System 输入验证错误漏洞 |
| CVE-2021-23906 | 1.8 LOW | Mercedes-Benz AG MBUX Infotainment System 输入验证错误漏洞 |
| CVE-2021-25693 | Teradici PCoIP Graphics Agent 代码问题漏洞 | |
| CVE-2020-25713 | Red Hat Enterprise Linux 缓冲区错误漏洞 | |
| CVE-2020-27830 | Linux kernel 代码问题漏洞 | |
| CVE-2020-28063 | ArticleCMS 代码问题漏洞 | |
| CVE-2020-20092 | ArticleCMS 代码问题漏洞 | |
| CVE-2020-27823 | OpenJPEG 缓冲区错误漏洞 | |
| CVE-2020-27824 | OpenJPEG 缓冲区错误漏洞 | |
| CVE-2020-14354 | Fedora 资源管理错误漏洞 | |
| CVE-2021-20250 | Red Hat JBoss EJB Client 信息泄露漏洞 | |
| CVE-2021-32918 | Prosodical Thoughts Prosody 资源管理错误漏洞 | |
| CVE-2021-25694 | Teradici PCoIP Graphics Agent 代码问题漏洞 | |
| CVE-2021-22154 | Blackberry BlackBerry UEM 信息泄露漏洞 | |
| CVE-2021-22153 | Blackberry BlackBerry UEM 安全漏洞 | |
| CVE-2021-22152 | Blackberry BlackBerry UEM 输入验证错误漏洞 | |
| CVE-2021-31215 | Schedmd SchedMD Slurm 安全漏洞 |
Showing top 20 of 36 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same weakness: CWE-367
- CVE-2026-9796
Keycloak: keycloak: privilege escalation via time-of-check t - CVE-2026-42336
MaxKB: SSRF Bypass via DNS Rebinding in MaxKB OSS URL Fetch - CVE-2026-24191
NVIDIA Display Driver 安全漏洞 - CVE-2026-45208
Trend Micro Apex One和TrendAI Vision One Endpoint Security - - CVE-2026-7837
TOCTOU with root privilege in ad_flush
V. Comments for CVE-2021-20181
No comments yet