EUVD-2026-62829
GHSA-c6cw-cvvr-xq54
Severity by source
AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Adjacent unauthenticated low-complexity out-of-bounds write yielding RCE/DoS on a privileged virtualization/system component justifies AV:A, PR:N, changed scope, and full C/I/A high 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 or 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 lets an unauthenticated adjacent-network attacker corrupt memory to achieve arbitrary code execution or crash the affected service (denial of service). The CVSS 3.1 base score is 9.6 (Critical) with a changed scope, reflecting potential impact beyond the vulnerable component on IBM Power hardware. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network adjacency to the target (CVSS AV:A) - the attacker must be on the same local/adjacent network segment (e.g., the same VLAN, L2 broadcast domain, or management network as the AIX host or VIOS partition), not the open internet. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are strong but incomplete. … 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 the IBM PSIRT advisory at https://www.ibm.com/support/pages/node/7283858 and apply the fixes/ifixes (interim fixes) IBM provides for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1 as your primary remediation; patch available per vendor advisory, but no exact fixed build level was provided in the input, so obtain the precise APAR/ifix from IBM before deployment. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct asset discovery to identify all systems running AIX 7.2, 7.3, or PowerVM VIOS 4.1 and implement emergency network isolation from untrusted adjacent networks; enable enhanced logging for all network connections to affected systems. …
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Same weakness CWE-787 – Out-of-bounds Write
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External POC / Exploit Code
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