CVE-2026-19446: CWE-400 Uncontrolled Resource Consumption in IBM AIX
Description
CVE-2026-19446 is a high-severity vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a remote unauthenticated attacker to send a crafted UDP packet to a reachable RPC service, causing uncontrolled resource consumption that results in complete system unavailability and requires an LPAR restart.
CVSS v3.1
Score 7.5high
Affected software
IBM
AIX
IBM
PowerVM VIOS
cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-400) affects IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. An attacker can exploit this by sending a specially crafted UDP packet to an RPC service accessible on the target system. The attack leads to uncontrolled resource consumption, causing the system to become completely unavailable and necessitating a restart of the Logical Partition (LPAR). The CVSS 3.1 base score is 7.5, reflecting a high severity with network attack vector, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
Successful exploitation results in complete denial of service due to resource exhaustion, making the affected system unavailable until it is manually restarted. There is no impact on confidentiality or integrity.
Mitigation Recommendations
No patch or official fix information is currently provided. Patch status is not yet confirmed — check IBM's vendor advisory for current remediation guidance. Until a fix is available, restricting access to the vulnerable RPC service and implementing network-level controls to block crafted UDP packets may help mitigate exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-10T13:37:37.902Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877e39acd9273b493410a8
Added to database: 08/20/2026, 22:22:49 UTC
Last enriched: 09/10/2026, 19:32:40 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 84
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