EUVD-2026-63645
GHSA-wg3p-fqph-53qg
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable, no auth or user interaction required; impact is availability-only with no scope change per description.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
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 buffer overflow.
AnalysisAI
Remote denial-of-service in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 allows unauthenticated network attackers to crash affected systems via a buffer overflow. The flaw is classified as CWE-787 (out-of-bounds write), enabling complete availability impact with no confidentiality or integrity exposure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special configuration or feature flag is identified in available data as a prerequisite - the CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates this is a remotely triggerable, unauthenticated flaw requiring no special conditions beyond network reachability of the affected IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 system. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) signals a straightforward, unauthenticated remote DoS with no complexity barriers - a serious operational concern for any organization running IBM Power infrastructure. … 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 | Patch available per vendor advisory - apply the fix described at https://www.ibm.com/support/pages/node/7283858 as the primary remediation. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems in production and staging; document network exposure and retrieve IBM patches from vendor advisory. …
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Memory Corruption
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External POC / Exploit Code
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