Oracle DTrace dtprobed flaw lets attacker create arbitrary files
CVE-2026-21991 Published on March 16, 2026
A DTrace component, dtprobed, allows arbitrary file creation through crafted USDT provider names.
Vulnerability Analysis
CVE-2026-21991 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-21991 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-21991
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Affected Versions
Oracle Corporation Oracle Linux:- Version 8 is affected.
- Version 9 is affected.
- Version 10 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.