CVE-2026-19446: CWE-400 Uncontrolled Resource Consumption in IBM AIX
CVE-2026-19446 is a high-severity vulnerability affecting IBM AIX versions 7.2 and 7.3, and IBM PowerVM VIOS 4.1. It allows a remote unauthenticated attacker to send a specially crafted UDP packet to a reachable RPC service, causing uncontrolled resource consumption that leads to complete system unavailability. Recovery requires an LPAR restart.
AI Analysis
Technical Summary
This vulnerability (CWE-400) in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 involves uncontrolled resource consumption triggered by a crafted UDP packet sent to an RPC service. The attack results in denial of service by making the system completely unavailable, necessitating a restart of the logical partition (LPAR). The CVSS 3.1 score is 7.5, indicating high severity with network attack vector, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation causes complete system unavailability, requiring an LPAR restart to recover. There is no impact on confidentiality or integrity, but availability is severely affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation is currently documented. Until a patch is available, affected systems should consider restricting access to the vulnerable RPC service or implementing network-level controls to block crafted UDP packets targeting this service.
CVE-2026-19446: CWE-400 Uncontrolled Resource Consumption in IBM AIX
Description
CVE-2026-19446 is a high-severity vulnerability affecting IBM AIX versions 7.2 and 7.3, and IBM PowerVM VIOS 4.1. It allows a remote unauthenticated attacker to send a specially crafted UDP packet to a reachable RPC service, causing uncontrolled resource consumption that leads to complete system unavailability. Recovery requires an LPAR restart.
CVSS v3.1
Score 7.5high
Affected software
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) in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 involves uncontrolled resource consumption triggered by a crafted UDP packet sent to an RPC service. The attack results in denial of service by making the system completely unavailable, necessitating a restart of the logical partition (LPAR). The CVSS 3.1 score is 7.5, indicating high severity with network attack vector, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation causes complete system unavailability, requiring an LPAR restart to recover. There is no impact on confidentiality or integrity, but availability is severely affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation is currently documented. Until a patch is available, affected systems should consider restricting access to the vulnerable RPC service or implementing network-level controls to block crafted UDP packets targeting this service.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-10T13:37:37.902Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a877e39acd9273b493410a8
Added to database: 08/20/2026, 22:22:49 UTC
Last enriched: 08/20/2026, 22:37:25 UTC
Last updated: 08/21/2026, 04:02:50 UTC
Views: 10
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