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CVE-2020-29569

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 through 5.10.1 与 Xen 4.14.x 一起使用时存在资源管理错误漏洞，该漏洞源于Linux内核PV块后端期望内核线程处理程序在停止时将ring->xenblkd重置为NULL。但是，如果前端在连接和断开状态之间快速切换，处理程序可能没有时间运行。因此，块后端可能会在释放指针后重用指针。行为不端的客户机可以通过持续连接、断开块前端的连接来触发dom0崩溃。不能排除特权升级和信息泄

AI Predicted 7.8 Difficulty: Moderate EPSS 0.39% · P31
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I. Basic Information for CVE-2020-29569

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 through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
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 资源管理错误漏洞
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 through 5.10.1 与 Xen 4.14.x 一起使用时存在资源管理错误漏洞，该漏洞源于Linux内核PV块后端期望内核线程处理程序在停止时将ring->xenblkd重置为NULL。但是，如果前端在连接和断开状态之间快速切换，处理程序可能没有时间运行。因此，块后端可能会在释放指针后重用指针。行为不端的客户机可以通过持续连接、断开块前端的连接来触发dom0崩溃。不能排除特权升级和信息泄
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-2020-29569

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III. Intelligence Information for CVE-2020-29569

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Vendor Advisories for CVE-2020-29569 (3)

Mailing List Discussions for CVE-2020-29569 (2)

Other References for CVE-2020-29569 (1)

Same Patch Batch · n/a · 2020-12-15 · 116 CVEs total

CVE-2020-28442 7.5 HIGH Prototype Pollution
CVE-2020-28456 7.3 HIGH Cross-site Scripting (XSS)
CVE-2020-28457 7.2 HIGH Cross-site Scripting (XSS)
CVE-2020-27055 Google Android 安全漏洞
CVE-2020-29482 Xen 代码问题漏洞
CVE-2020-29480 Xen 授权问题漏洞
CVE-2020-29479 Xen 权限许可和访问控制问题漏洞
CVE-2020-29571 Xen 代码问题漏洞
CVE-2020-29570 Xen 安全漏洞
CVE-2020-27777 Linux kernel 授权问题漏洞
CVE-2020-25712 xorg-x11-server 缓冲区错误漏洞
CVE-2020-29568 Xen 缓冲区错误漏洞
CVE-2020-29567 Xen 安全漏洞
CVE-2020-29566 Xen 处理逻辑错误漏洞
CVE-2020-27068 Google Android 缓冲区错误漏洞
CVE-2020-27067 Google Android 资源管理错误漏洞
CVE-2020-27066 Google Android 资源管理错误漏洞
CVE-2020-27048 Google Android 缓冲区错误漏洞
CVE-2020-27047 Google Android 缓冲区错误漏洞
CVE-2020-27046 Google Android 缓冲区错误漏洞

Showing top 20 of 116 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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Same vendor: n/a

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