Local Kernel Memory Corruption Vulnerability in IBM AIX and PowerVM
CVE-2026-19783

6.7MEDIUM

Key Information:

Vendor

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

What is CVE-2026-19783?

The vulnerability in IBM AIX versions 7.2 and 7.3, along with IBM PowerVM VIOS 4.1, allows local attackers to exploit insufficient validation during directory reads. By crafting a malicious filesystem image, attackers can perform an out-of-bounds write to the kernel stack, which may lead to a system crash or enable unauthorized privilege escalation.

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:
6.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
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/).
.