EUVD-2026-63751
GHSA-5x8c-w6hj-rjr7
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
UDP RPC service is network-exposed, requires no authentication or interaction; impact is solely availability loss with no confidentiality or integrity consequence.
Primary rating from Vendor (us).
CVSS VectorVendor: us
Lifecycle Timeline
2DescriptionCVE.org
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 allows a remote unauthenticated attacker can send a crafted UDP packet to a reachable RPC service, resulting in complete system unavailability and requiring an LPAR restart.
AnalysisAI
Remote denial-of-service in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 allows an unauthenticated network attacker to crash affected systems by sending a crafted UDP packet to the RPC service. The attack requires no credentials or user interaction and results in complete system unavailability, demanding an LPAR restart to recover - a non-trivial operational impact for enterprise environments running critical POWER-based workloads. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The RPC service must be reachable over UDP from the attacker's network position - this is the sole prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 score and vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H accurately reflect the risk profile: network-reachable, zero authentication, low complexity, and full availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the IBM advisory at https://www.ibm.com/support/pages/node/7283858 for official APARs and Technology Level fixes; specific patched versions are not independently confirmed from the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems and identify which are exposed to untrusted networks or internet-facing environments. …
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Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
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External POC / Exploit Code
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