Executive Summary

Informations
Name CVE-2025-21646 First vendor Publication 2025-01-19
Vendor Cve Last vendor Modification 2025-01-23

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:

afs: Fix the maximum cell name length

The kafs filesystem limits the maximum length of a cell to 256 bytes, but a problem occurs if someone actually does that: kafs tries to create a directory under /proc/net/afs/ with the name of the cell, but that fails with a warning:

WARNING: CPU: 0 PID: 9 at fs/proc/generic.c:405

because procfs limits the maximum filename length to 255.

However, the DNS limits the maximum lookup length and, by extension, the maximum cell name, to 255 less two (length count and trailing NUL).

Fix this by limiting the maximum acceptable cellname length to 253. This also allows us to be sure we can create the "/afs/./" mountpoint too.

Further, split the YFS VL record cell name maximum to be the 256 allowed by the protocol and ignore the record retrieved by YFSVL.GetCellName if it exceeds 253.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21646

Sources (Detail)

https://git.kernel.org/stable/c/7673030efe0f8ca1056d3849d61784c6caa052af
https://git.kernel.org/stable/c/7922b1f058fe24a93730511dd0ae2e1630920096
https://git.kernel.org/stable/c/7cb3e77e9b4e6ffa325a5559393d3283c9af3d01
https://git.kernel.org/stable/c/8fd56ad6e7c90ac2bddb0741c6b248c8c5d56ac8
https://git.kernel.org/stable/c/aabe47cf5ac5e1db2ae0635f189d836f67024904
Source Url

Alert History

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0
1
Date Informations
2025-01-23 21:20:32
  • Multiple Updates
2025-01-19 17:20:28
  • First insertion