Executive Summary

Informations
Name CVE-2021-47111 First vendor Publication 2024-03-15
Vendor Cve Last vendor Modification 2024-03-17

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

In the Linux kernel, the following vulnerability has been resolved:

xen-netback: take a reference to the RX task thread

Do this in order to prevent the task from being freed if the thread returns (which can be triggered by the frontend) before the call to kthread_stop done as part of the backend tear down. Not taking the reference will lead to a use-after-free in that scenario. Such reference was taken before but dropped as part of the rework done in 2ac061ce97f4.

Reintroduce the reference taking and add a comment this time explaining why it's needed.

This is XSA-374 / CVE-2021-28691.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47111

Sources (Detail)

https://git.kernel.org/stable/c/107866a8eb0b664675a260f1ba0655010fac1e08
https://git.kernel.org/stable/c/6b53db8c4c14b4e7256f058d202908b54a7b85b4
https://git.kernel.org/stable/c/caec9bcaeb1a5f03f2d406305355c853af10c13e
Source Url

Alert History

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0
1
Date Informations
2024-03-18 05:27:29
  • Multiple Updates
2024-03-16 00:27:24
  • First insertion