PT-2025-4319 · Linux+7 · Linux Kernel+7
Published
2025-01-08
·
Updated
2025-10-03
·
CVE-2025-21638
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 Linux kernel, where using the 'net' structure via 'current' 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 result in an 'Oops' (null-ptr-deref) 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 to prevent potential null pointer dereferences. Restrict access to the vulnerable
sctp.ctl sock 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
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu