EUVD-2026-62738
GHSA-994c-9c72-q3fw
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Adjacent network access required to reach the vulnerable service; no authentication or interaction needed; heap overflow enables full system compromise with no scope change.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
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 heap buffer overflow.
AnalysisAI
Heap buffer overflow in IBM AIX 7.2, 7.3 and IBM PowerVM VIOS 4.1 enables unauthenticated adjacent-network attackers to execute arbitrary code on affected systems. The CWE-787 out-of-bounds write flaw carries a CVSS score of 8.8 and yields full confidentiality, integrity, and availability compromise upon successful exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be positioned on the same adjacent network segment (LAN, VLAN, or broadcast domain) as the target IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 system - this is the AV:A constraint confirmed by the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects high CIA impact, but the attack vector AV:A (Adjacent Network) is the critical limiting factor: an attacker must be co-located on the same network segment, VLAN, or broadcast domain as the target system - full internet-reachability is not the threat model. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained a foothold on the same network segment as an IBM AIX or PowerVM VIOS system - via a compromised jump host, insider access, or a shared data-center LAN - sends specially crafted network packets to a vulnerable listening service. The malformed input triggers the heap buffer overflow, corrupting heap control structures or overwriting a function pointer, which the attacker redirects to shellcode or a ROP chain to achieve arbitrary code execution on the Power host. … |
| Remediation | A vendor-released patch is available per IBM's support advisory at https://www.ibm.com/support/pages/node/7283858; administrators should apply the relevant AIX 7.2/7.3 and PowerVM VIOS 4.1 fix immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Immediately identify and inventory all IBM AIX 7.2, 7.3 and PowerVM VIOS 4.1 systems. …
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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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