CVE-2025-68733

Unauthorized label creation via premature Smack import

Published Dec 24, 2025 · Updated Dec 24, 2025

Authorization bypass in the Linux kernel Smack module allows local users to create arbitrary security labels through a task attribute write. The Smack do_setattr() path imports an untrusted label before checking whether it appears in the task's relabel-self list. The flaw is reachable only when relabel-self is nonempty, and it lets an unprivileged task introduce labels outside that configured list, weakening mandatory access-control policy.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in the Linux kernel Smack module allows local users to create arbitrary security labels through a task attribute write. The Smack do_setattr() path imports an untrusted label before checking whether it appears in the task's relabel-self list. The flaw is reachable only when relabel-self is nonempty, and it lets an unprivileged task introduce labels outside that configured list, weakening mandatory access-control policy.

The record

CVE
CVE-2025-68733
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=38416e53936ecf896948fdeffc36b76979117952 <60e8d49989410a7ade60f5dadfcd979c117d05c0
  2. Affected versionversion=38416e53936ecf896948fdeffc36b76979117952 <64aa81250171b6bb6803e97ea7a5d73bfa061f6e
  3. Affected versionversion=38416e53936ecf896948fdeffc36b76979117952 <ac9fce2efabad37c338aac86fbe100f77a080e59
  4. Affected versionversion=38416e53936ecf896948fdeffc36b76979117952 <c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3
  5. Affected versionversion=4.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=38416e53936ecf896948fdeffc36b76979117952 <60e8d49989410a7ade60f5dadfcd979c117d05c0; version=38416e53936ecf896948fdeffc36b76979117952 <64aa81250171b6bb6803e97ea7a5d73bfa061f6e; version=38416e53936ecf896948fdeffc36b76979117952 <ac9fce2efabad37c338aac86fbe100f77a080e59; version=38416e53936ecf896948fdeffc36b76979117952 <c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3; version=4.4

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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