Heap Buffer Overflow in IBM AIX and PowerVM Products
CVE-2026-16847

8.8HIGH

Key Information:

Vendor

IBM
Status
Aix
Powervm ViOS
Vendor
CVE Published:
19 August 2026

What is CVE-2026-16847?

A vulnerability identified in IBM AIX versions 7.2 and 7.3 and IBM PowerVM VIOS 4.1 allows remote attackers to exploit a heap buffer overflow. This can potentially permit unauthorized execution of arbitrary code, posing significant risks to system integrity and security. Organizations using these affected products should evaluate their exposure and apply necessary updates and patches to mitigate the risk. For further guidance, refer to the official IBM advisory.

Affected Version(s)

AIX 7.2

AIX 7.3

PowerVM VIOS 4.1

References

https://www.ibm.com/support/pages/node/7283858
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

CVE-2026-14970, CVE-2026-15061, CVE-2026-15078, CVE-2026-15065, CVE-2026-15068 were reported to IBM by Oneconsult AG (https://oneconsult.com/).
.