CVE-2025-68733
Unknown Unknown - Not Provided

Privilege Escalation via Label Creation Bug in Linux Smack

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: smack: fix bug: unprivileged task can create labels If an unprivileged task is allowed to relabel itself (/smack/relabel-self is not empty), it can freely create new labels by writing their names into own /proc/PID/attr/smack/current This occurs because do_setattr() imports the provided label in advance, before checking "relabel-self" list. This change ensures that the "relabel-self" list is checked before importing the label.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-07-06
AI Q&A
2025-12-24
EPSS Evaluated
2026-07-05
NVD
CVE-2025-68733

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
linux kernel *
linux linux_kernel *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability in the Linux kernel's Smack security module allows an unprivileged task to create new security labels if the /smack/relabel-self list is not empty. The issue arises because the kernel imports the provided label before verifying if the task is allowed to relabel itself, enabling unauthorized creation of labels by writing to /proc/PID/attr/smack/current. The fix ensures the relabel-self list is checked before importing the label.

Impact Analysis

This vulnerability can allow unprivileged tasks to create arbitrary security labels, potentially leading to unauthorized access or privilege escalation within the system. This undermines the integrity of the Smack security policy enforcement, possibly allowing attackers to bypass security restrictions.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2025-68733. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart