CVE-2021-20321
Quick assessment
Affected
n/a kernel
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.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在竞争条件问题漏洞，该漏洞源于 overlayfs 文件系统中的竞争条件问题。
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I. Basic Information for CVE-2021-20321
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在竞争条件问题漏洞，该漏洞源于 overlayfs 文件系统中的竞争条件问题。
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 |
|---|---|---|---|---|
| - | kernel | kernel 5.15-rc5 | - |
|
II. Public POCs for CVE-2021-20321
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-20321 (2)
-
https://bugzilla.redhat.com/show_bug.cgi?id=2013242 x_refsource_MISC
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Other References for CVE-2021-20321 (1)
Same Patch Batch · n/a · 2022-02-18 · 67 CVEs total
| CVE-2022-25299 | 9.8 CRITICAL | Arbitrary File Write |
| CVE-2021-23702 | 7.6 HIGH | Prototype Pollution |
| CVE-2022-25298 | 7.5 HIGH | Path Traversal |
| CVE-2021-46062 | MingSoft MCMS 安全漏洞 | |
| CVE-2022-25134 | TotoLink routers 命令注入漏洞 | |
| CVE-2022-25135 | TotoLink routers 命令注入漏洞 | |
| CVE-2022-25133 | TotoLink routers 命令注入漏洞 | |
| CVE-2021-46110 | Online Shopping Portal 安全漏洞 | |
| CVE-2021-46082 | Moxa Tn-5900 安全漏洞 | |
| CVE-2021-46063 | MingSoft MCMS 代码代码注入漏洞 | |
| CVE-2021-40841 | LiveConfig 路径遍历漏洞 | |
| CVE-2021-46037 | MingSoft MCMS 安全漏洞 | |
| CVE-2021-46036 | MingSoft MCMS 代码问题漏洞 | |
| CVE-2021-30650 | Broadcom Symantec Layer7 API Management OAuth Toolkit跨站脚本漏洞 | |
| CVE-2020-8242 | Packet Tide ExpressionEngine 安全漏洞 | |
| CVE-2021-3657 | Sourceforge mbsync 缓冲区错误漏洞 | |
| CVE-2021-3947 | QEMU 缓冲区错误漏洞 | |
| CVE-2021-3930 | QEMU 安全漏洞 | |
| CVE-2021-20325 | Red Hat Enterprise Linux 代码问题漏洞 | |
| CVE-2021-20322 | Linux kernel 安全特征问题漏洞 |
Showing top 20 of 67 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-20321
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