[ GLSA 202604-04 ] DTrace: Arbitrary file creation via dtprobed

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Gentoo Linux Security Advisory                           GLSA 202604-04
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: DTrace: Arbitrary file creation via dtprobed
     Date: April 17, 2026
     Bugs: #971491
       ID: 202604-04

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Synopsis
========

A DTrace component, dtprobed, allows arbitrary file creation through
crafted USDT provider names.

Background
==========

DTrace is a dynamic tracing tool for analysing or debugging the whole
system. Specifically, dtprobed is a component of the DTrace system that
keeps track of USDT probes within running processes, parsing and storing
the DOF they provide for later consumption by dtrace proper.

Affected packages
=================

Package           Vulnerable    Unaffected
----------------  ------------  ------------
dev-debug/dtrace  < 2.0.6       >= 2.0.6

Description
===========

A vulnerability has been found in dtprobed that allows for arbitrary
file creation through specially crafted USDT provider names.

Impact
======

The worst possible outcome is the ability for an attacker to run
arbitrary code via the maliciously created file.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All DTrace users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-debug/dtrace-2.0.6"

References
==========

[ 1 ] CVE-2026-21991
      https://nvd.nist.gov/vuln/detail/CVE-2026-21991

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202604-04

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2026 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5
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