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CVE-2022-39842

Quick assessment

Affected
n/a n/a
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 5.19 之前版本存在输入验证错误漏洞，该漏洞源于在drivers/video/fbdev/pxa3xx-gcu.c中的pxa3xx_gcu_write中，count参数存在size_t与int的类型冲突，导致整数溢出并绕过大小检查，因为它被用作copy_from_user()的第三个参数，所以可能会发生堆溢出。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.58% · P45

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2022-39842

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in the Linux kernel before 5.19. In pxa3xx_gcu_write in drivers/video/fbdev/pxa3xx-gcu.c, the count parameter has a type conflict of size_t versus int, causing an integer overflow and bypassing the size check. After that, because it is used as the third argument to copy_from_user(), a heap overflow may occur. NOTE: the original discoverer disputes that the overflow can actually happen.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 输入验证错误漏洞
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 5.19 之前版本存在输入验证错误漏洞，该漏洞源于在drivers/video/fbdev/pxa3xx-gcu.c中的pxa3xx_gcu_write中，count参数存在size_t与int的类型冲突，导致整数溢出并绕过大小检查，因为它被用作copy_from_user()的第三个参数，所以可能会发生堆溢出。
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
- n/a n/a -

II. Public POCs for CVE-2022-39842

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III. Intelligence Information for CVE-2022-39842

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Patches & Fixes for CVE-2022-39842 (1)

Vendor Advisories for CVE-2022-39842 (1)

Mailing List Discussions for CVE-2022-39842 (2)

Other References for CVE-2022-39842 (2)

Same Patch Batch · n/a · 2022-09-05 · 15 CVEs total

CVE-2022-38367 Atlassian Jira 安全漏洞
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CVE-2022-39838 Systematic Alpha Management FIX Adapter 路径遍历漏洞
CVE-2022-39843 123elf 缓冲区错误漏洞
CVE-2022-39839 Cotonti Siena 跨站脚本漏洞
CVE-2022-39840 Cotonti Siena 跨站脚本漏洞
CVE-2022-39831 GNU PSPP 缓冲区错误漏洞
CVE-2022-39832 GNU PSPP 缓冲区错误漏洞
CVE-2022-39828 SAMSUNG mTower 安全漏洞
CVE-2022-39829 SAMSUNG mTower 代码问题漏洞
CVE-2022-39830 SAMSUNG mTower 安全漏洞
CVE-2022-39824 Appsmith 跨站脚本漏洞
CVE-2022-30331 TigerGraph 输入验证错误漏洞
CVE-2022-31814 pfSense 操作系统命令注入漏洞

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a

V. Comments for CVE-2022-39842

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