Linux Kernel up to 6.12.62/6.17.12/6.18.1 /smack/relabel-self do_setattr privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.62/6.17.12/6.18.1 and classified as critical. Impacted is the function do_setattr of the file /smack/relabel-self. The manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2025-68733. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.62/6.17.12/6.18.1. It has been classified as critical. Affected is the function do_setattr of the file /smack/relabel-self. The impact remains unknown. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-68733 since 12/24/2025. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/12/2026).

The vulnerability scanner Nessus provides a plugin with the ID 279723 (Linux Distros Unpatched Vulnerability : CVE-2025-68733), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.63, 6.17.13, 6.18.2 or 6.19-rc1 eliminates this vulnerability. Applying the patch ac9fce2efabad37c338aac86fbe100f77a080e59/64aa81250171b6bb6803e97ea7a5d73bfa061f6e/60e8d49989410a7ade60f5dadfcd979c117d05c0/c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (279723), EUVD (EUVD-2025-205064) and CERT Bund (WID-SEC-2025-2920). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 279723
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-68733

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.63/6.17.13/6.18.2/6.19-rc1
Patch: ac9fce2efabad37c338aac86fbe100f77a080e59/64aa81250171b6bb6803e97ea7a5d73bfa061f6e/60e8d49989410a7ade60f5dadfcd979c117d05c0/c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3

Timelineinfo

12/24/2025 Advisory disclosed
12/24/2025 +0 days CVE reserved
12/24/2025 +0 days VulDB entry created
01/12/2026 +19 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-68733 (🔒)
GCVE (CVE): GCVE-0-2025-68733
GCVE (VulDB): GCVE-100-338244
EUVD: 🔒
CERT Bund: WID-SEC-2025-2920 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 12/24/2025 16:35
Updated: 01/12/2026 04:25
Changes: 12/24/2025 16:35 (58), 12/25/2025 23:33 (7), 12/29/2025 12:41 (2), 01/12/2026 04:25 (1)
Complete: 🔍
Cache ID: 216::103

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