EUVD-2026-63721
GHSA-w6hf-9jqv-r7p4
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable, unauthenticated integer overflow causes system unavailability only; no confidentiality or integrity impact is described or implied.
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 could allow a remote attacker to cause a denial of service due to an integer overflow.
AnalysisAI
Remote denial of service in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 is achievable by unauthenticated remote attackers via an integer overflow (CWE-190) in a network-reachable component. The CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates exploitation requires no authentication and no special configuration, making all internet- or network-exposed instances directly at risk. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required per the CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U): remote unauthenticated exploitation against default network-accessible configurations of IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) places this firmly in the High severity band, and the attack surface is maximally exposed: network-reachable, unauthenticated, low complexity. … 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 and apply the remediation documented in the IBM security advisory at https://www.ibm.com/support/pages/node/7283858. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and isolate all internet- or network-exposed IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems; implement firewall rules or network segmentation to restrict unauthenticated access to vulnerable components; enable comprehensive security logging. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Denial Of Service
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External POC / Exploit Code
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