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CVE-2021-26932

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 3.2 through 5.10.16 存在安全漏洞，该漏洞源于忽略了一些错误，有效地暗示了相关批处理元素的成功。

AI Predicted 7.8 Difficulty: Hard EPSS 0.35% · P26
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I. Basic Information for CVE-2021-26932

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 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then loops over the results, performing follow-up actions based on the success or failure of each operation. Unfortunately, when running in PV mode, the Linux backend drivers mishandle this: Some errors are ignored, effectively implying their success from the success of related batch elements. In other cases, errors resulting from one batch element lead to further batch elements not being inspected, and hence successful ones to not be possible to properly unmap upon error recovery. Only systems with Linux backends running in PV mode are vulnerable. Linux backends run in HVM / PVH modes are not vulnerable. This affects arch/*/xen/p2m.c and drivers/xen/gntdev.c.
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 安全漏洞
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 3.2 through 5.10.16 存在安全漏洞，该漏洞源于忽略了一些错误，有效地暗示了相关批处理元素的成功。
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-2021-26932

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III. Intelligence Information for CVE-2021-26932

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Patches & Fixes for CVE-2021-26932 (1)

Vendor Advisories for CVE-2021-26932 (1)

Mailing List Discussions for CVE-2021-26932 (4)

Other References for CVE-2021-26932 (1)

Same Patch Batch · n/a · 2021-02-17 · 87 CVEs total

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Showing top 20 of 87 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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Same vendor: n/a

V. Comments for CVE-2021-26932

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