PT-2025-4318 · Linux+6 · Linux Kernel+6
Published
2025-01-08
·
Updated
2025-10-03
·
CVE-2025-21637
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.6.74
Description
The issue concerns the use of
current->nsproxy in the Linux kernel, which is not recommended due to inconsistency and potential null pointer dereferences. The net structure can be obtained from table->data using container of(). This problem can lead to an 'Oops' (null-ptr-deref) in certain cases, such as when the current task is exiting.Recommendations
For Linux kernel versions prior to 6.6.74, update to version 6.6.74 or later to resolve the issue. As a temporary workaround, consider avoiding the use of
current->nsproxy and instead obtain the net structure from table->data using container of(). Restrict access to vulnerable kernel functions to minimize the risk of exploitation.Exploit
Fix
NULL Pointer Dereference
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu