EUVD-2026-63699
GHSA-64xf-296q-xgwf
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable unauthenticated DoS with no scope change; impact limited entirely to availability with no confidentiality or integrity effect.
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 an out-of-bounds write.
AnalysisAI
Out-of-bounds write in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 enables remote unauthenticated attackers to crash affected systems by sending crafted network input, resulting in a denial of service. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) indicates straightforward network-reachable exploitation with no privilege or user interaction required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network-level connectivity to a service or protocol handler running on IBM AIX 7.2 or 7.3, or IBM PowerVM VIOS 4.1. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.5 High with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H signals unauthenticated, low-complexity network exploitation with full availability impact - a serious DoS posture on paper. … 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 | The primary fix is a vendor-released patch available through IBM's support portal at https://www.ibm.com/support/pages/node/7283858; administrators should apply the applicable AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1 fix packs as directed in that advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running IBM AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1, and assess their exposure to untrusted networks. …
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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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