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CVE-2021-4093

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 存在安全漏洞，该漏洞源于蓝牙子系统中存在释放后重用漏洞，攻击者可以可利用该漏洞造成拒绝服务。

AI Predicted 9.8 Difficulty: Easy EPSS 0.42% · P36
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I. Basic Information for CVE-2021-4093

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 缓冲区错误漏洞
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 存在安全漏洞，该漏洞源于蓝牙子系统中存在释放后重用漏洞，攻击者可以可利用该漏洞造成拒绝服务。
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
- kernel kernel 5.15 -

II. Public POCs for CVE-2021-4093

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III. Intelligence Information for CVE-2021-4093

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Vendor Advisories for CVE-2021-4093 (1)

Other References for CVE-2021-4093 (1)

Same Patch Batch · n/a · 2022-02-18 · 66 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 66 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-125