Executive Summary

Informations
Name CVE-2025-22126 First vendor Publication 2025-04-16
Vendor Cve Last vendor Modification 2025-04-25

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:

md: fix mddev uaf while iterating all_mddevs list

While iterating all_mddevs list from md_notify_reboot() and md_exit(), list_for_each_entry_safe is used, and this can race with deletint the next mddev, causing UAF:

t1: spin_lock //list_for_each_entry_safe(mddev, n, ...)
mddev_get(mddev1)
// assume mddev2 is the next entry
spin_unlock
t2:
//remove mddev2
...
mddev_free
spin_lock
list_del
spin_unlock
kfree(mddev2)
mddev_put(mddev1)
spin_lock
//continue dereference mddev2->all_mddevs

The old helper for_each_mddev() actually grab the reference of mddev2 while holding the lock, to prevent from being freed. This problem can be fixed the same way, however, the code will be complex.

Hence switch to use list_for_each_entry, in this case mddev_put() can free the mddev1 and it's not safe as well. Refer to md_seq_show(), also factor out a helper mddev_put_locked() to fix this problem.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-22126

Sources (Detail)

https://git.kernel.org/stable/c/5462544ccbad3fc938a71b01fa5bd3a0dc2b750a
https://git.kernel.org/stable/c/8542870237c3a48ff049b6c5df5f50c8728284fa
https://git.kernel.org/stable/c/ca9f84de76723b358dfc0606668efdca54afc2e5
https://git.kernel.org/stable/c/d69a23d8e925f8052d657652a6875ec2712c7e33
https://git.kernel.org/stable/c/e2a9f73ee408a460f4c9dfe03b4741d6b11652b8
Source Url

Alert History

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0
Date Informations
2025-05-27 02:55:30
  • First insertion