EUVD-2026-63675
GHSA-26j6-m5g9-2q7v
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack vector confirmed; low-privilege shell required; heap overflow yields full system control with no scope change to other systems.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to execute arbitrary code due to a heap-based buffer overflow.
AnalysisAI
Heap-based buffer overflow in IBM AIX 7.2, 7.3 and IBM PowerVM VIOS 4.1 enables a local, low-privileged attacker to execute arbitrary code, achieving full compromise of confidentiality, integrity, and availability. The vulnerability stems from unsafe memory writes (CWE-787) that corrupt heap structures at runtime. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an existing local shell session on the target IBM AIX (7.2 or 7.3) or PowerVM VIOS (4.1) system with at least low-level OS privileges (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score reflects a serious but local vulnerability: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H indicates the attacker must already have a low-privileged local shell, but once present, exploitation is low-complexity and requires no user interaction - yielding full system impact. … 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 the vendor-released patch documented at https://www.ibm.com/support/pages/node/7283858; exact fix versions should be obtained directly from that advisory, as they are not independently confirmed in available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all IBM AIX (7.2 and 7.3) and PowerVM VIOS 4.1 systems and document local user access controls and privilege configurations. …
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OS command injection in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 lets a remote, low-privileged authenticated attacker ru
OS command injection in IBM AIX 7.2 and 7.3 and in IBM PowerVM VIOS 4.1 lets a remote, authenticated attacker execute ar
OS command injection in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 lets a remote authenticated attacker run arbitrary commands
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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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