CVE-2026-21991

Name: CVE-2026-21991
Creator: NVD / NIST
Published: 2026-03-16T22:16:18.397+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2026-21991 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A DTrace component, dtprobed, allows arbitrary file creation through crafted USDT provider names.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.18%

7.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions	Update
Oracle	Linux	8	—
Oracle	Linux	9	0
Oracle	Linux	10	0

References

https://linux.oracle.com/cve/CVE-2026-21991.htmlVendor Advisory

Timeline

Published: Mar 16, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-21991?

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

How severe is CVE-2026-21991?

CVE-2026-21991 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2026-21991?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-21991?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST