EUVD-2026-62875
GHSA-396g-vpw6-q672
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack requiring a standard unprivileged account; full C/I/A:H reflects total system compromise via privilege escalation with no scope change.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/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 local attacker to achieve local privilege escalation due to an out-of-bounds write.
AnalysisAI
Local privilege escalation in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 stems from an out-of-bounds write (CWE-787) that allows a low-privileged local attacker to achieve complete system compromise across confidentiality, integrity, and availability. The CVSS 7.8 score (AV:L/AC:L/PR:L/UI:N) reflects low-complexity exploitation requiring only a standard local account - a realistic threshold for insider threats or post-exploitation lateral movement within IBM Power environments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local shell session on the affected host - the attacker must have low-privilege OS-level access to IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 (CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H establishes a local-only, low-complexity attack requiring only a standard unprivileged account - conditions achievable by any authenticated user, malicious insider, or attacker who has previously obtained a foothold. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained a low-privileged local account on an IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 system - whether through credential theft, phishing, or a prior compromise - invokes a vulnerable OS component with crafted input that triggers an out-of-bounds write, corrupting an adjacent kernel data structure. By controlling the overwritten memory region, the attacker overwrites a privilege indicator or function pointer to redirect execution with elevated rights, achieving root access. … |
| Remediation | The primary remediation is to apply the IBM-released patch referenced in the vendor advisory at https://www.ibm.com/support/pages/node/7283858. … 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 document current patch levels across the estate. …
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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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