EUVD-2026-63736
GHSA-wj6h-49gv-jh4h
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable service requiring no authentication; impact independently assessed as availability-only crash consistent with vendor's C:N/I:N/A:H designation.
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 a stack buffer overflow.
AnalysisAI
Stack buffer overflow in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 enables remote unauthenticated denial of service via network. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms no authentication is required and exploitation is low-complexity, making the availability impact (A:H) readily achievable by any network-reachable attacker. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms exploitation requires only network reachability to the vulnerable service on IBM AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1 - no authentication and no user interaction are required against a default-accessible network service. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 High score is driven by AV:N/AC:L/PR:N/UI:N - network-reachable, low complexity, no authentication, no user interaction - representing a worst-case exploitability profile. … 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 fix detailed in the IBM Security Advisory at https://www.ibm.com/support/pages/node/7283858 for IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of systems running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 and document their network exposure. …
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
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External POC / Exploit Code
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