EUVD-2026-63719
GHSA-j437-fhrr-26hx
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description states remote arbitrary code execution via buffer overflow with no stated auth or interaction, supporting AV:N/AC:L/PR:N/UI:N and full C/I/A impact.
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 execute arbitrary code due to a buffer overflow.
AnalysisAI
Remote code execution in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 stems from a buffer overflow (out-of-bounds write) that a remote attacker can trigger to run arbitrary code on affected IBM Power-based Unix systems. The flaw was reported by IBM's own PSIRT and carries a CVSS 9.8 rating reflecting network-reachable, unauthenticated, no-interaction exploitation with full confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker needs network reachability to the affected component on an IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 host and the ability to send crafted input that triggers the out-of-bounds write; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication, no user interaction, and no special non-default configuration is stated as required. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals point strongly toward high real-world risk rather than an inflated score: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes remote, low-complexity, unauthenticated exploitation with no user interaction, and the CIA impact is High/High/High, yielding 9.8. … 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 | Apply IBM's fix as the primary remediation: consult the IBM advisory at https://www.ibm.com/support/pages/node/7283858 and install the vendor-provided iFix or fix pack for your exact AIX 7.2/7.3 or VIOS 4.1 technology level - Patch available per vendor advisory, though an exact patched version string is not included in the provided data and must be taken from IBM's page. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct complete inventory and discovery of all IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems across production and non-production environments to establish the scope of potentially affected infrastructure. …
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Memory Corruption
View allShare
External POC / Exploit Code
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