CVE-2026-21991 — MEDIUM (5.5)

Vulnerability Description

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

CVSS Score

5.5

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Oracle	Linux	8

Related Weaknesses (CWE)

CWE-22

References

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

FAQ

What is CVE-2026-21991?

CVE-2026-21991 is a vulnerability with a CVSS score of 5.5 (MEDIUM). A DTrace component, dtprobed, allows arbitrary file creation through crafted USDT provider names.

How severe is CVE-2026-21991?

CVE-2026-21991 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-21991?

Check the references section above for vendor advisories and patch information. Affected products include: Oracle Linux.