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CVE-2022-33742

Quick assessment

Affected
Linux Linux
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.

Xen是英国剑桥（Cambridge）大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 存在安全漏洞，该漏洞源于授权表的粒度不允许共享小于 4K 的页面，从而导致与后端共享的数据位于同一 4K 页面中的不相关数据可由该后端访问。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.33% · P24
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I. Basic Information for CVE-2022-33742

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).
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
Xen 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是英国剑桥（Cambridge）大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 存在安全漏洞，该漏洞源于授权表的粒度不允许共享小于 4K 的页面，从而导致与后端共享的数据位于同一 4K 页面中的不相关数据可由该后端访问。
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
Linux Linux consult Xen advisory XSA-403 -
Xen xen consult Xen advisory XSA-403 -

II. Public POCs for CVE-2022-33742

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III. Intelligence Information for CVE-2022-33742

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Vendor Advisories for CVE-2022-33742 (1)

Mailing List Discussions for CVE-2022-33742 (3)

Other References for CVE-2022-33742 (2)

Same Patch Batch · Linux · 2022-07-05 · 6 CVEs total

CVE-2022-33741 Xen 信息泄露漏洞
CVE-2022-33740 Xen 信息泄露漏洞
CVE-2022-26365 Linux kernel 信息泄露漏洞
CVE-2022-33743 Xen 安全漏洞
CVE-2022-33744 Xen 安全漏洞

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-33742

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