CVE-2026-16855 — MEDIUM (5.5)

Vulnerability Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause a denial of service due to a heap buffer overflow.

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

Related Weaknesses (CWE)

CWE-787

References

https://www.ibm.com/support/pages/node/7283858

FAQ

What is CVE-2026-16855?

CVE-2026-16855 is a vulnerability with a CVSS score of 5.5 (MEDIUM). IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause a denial of service due to a heap buffer overflow.

How severe is CVE-2026-16855?

CVE-2026-16855 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-2026-16855?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.