EUVD-2026-63672
GHSA-q3r2-865f-xxr5
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Local access with low privileges required; scope change reflects potential VIOS hypervisor boundary escape affecting co-resident LPARs.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to execute arbitrary code due to a buffer overflow.
AnalysisAI
Local code execution via buffer overflow affects IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1, allowing a low-privileged local attacker to execute arbitrary code with a scope change that can compromise components beyond the initially vulnerable boundary. The CVSS vector (AV:L/AC:L/PR:L/UI:N/S:C) indicates exploitation requires only a local shell with standard user privileges and no interaction, yet the scope change elevates the impact to full CIA triad compromise. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have a local interactive or programmatic session on the affected AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1 system with at least low-privilege credentials (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 8.8 with a scope-changing local vector represents a credible and serious risk for any organization running IBM POWER infrastructure with AIX or PowerVM VIOS. … 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 | IBM has released a patch, and administrators should apply it immediately via the IBM advisory at https://www.ibm.com/support/pages/node/7283858, which will specify the exact fix PTF or technology level for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all systems running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1, and prioritize those supporting production or revenue-generating workloads. …
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Same weakness CWE-787 – Out-of-bounds Write
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External POC / Exploit Code
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