Oracle Linux 8/9/10 dtprobed path traversal

Summaryinfo

A vulnerability identified as critical has been detected in Oracle Linux 8/9/10. Affected is an unknown function of the component dtprobed. Performing a manipulation results in denial of service. This vulnerability is cataloged as CVE-2026-21991. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability was found in Oracle Linux 8/9/10. It has been classified as critical. This affects some unknown functionality of the component dtprobed. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-22. The product 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 product 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. This is going to have an impact on availability. The summary by CVE is:

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

It is possible to read the advisory at linux.oracle.com. This vulnerability is uniquely identified as CVE-2026-21991 since 01/05/2026. The exploitability is told to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/22/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 302243 (Oracle Linux 8 : dtrace (ELSA-2026-50151)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (302243) and EUVD (EUVD-2026-12522). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Oracle

Name

• Linux

Version

• 8
• 9
• 10

License

• open-source

Website

• Vendor: https://www.oracle.com

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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