EUVD-2026-63637
GHSA-99pp-4r9g-w8c8
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Local access with low-privilege account required; read-only flaw yields no integrity impact; high confidentiality and availability reflect memory disclosure and crash potential.
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 local attacker to obtain sensitive information or cause a denial of service due to an out-of-bounds read.
AnalysisAI
Out-of-bounds read in IBM AIX 7.2, 7.3 and PowerVM VIOS 4.1 enables local low-privileged attackers to either extract sensitive memory contents or crash the system, producing a denial of service. The flaw (CWE-125) requires only a standard local user account with no additional configuration, making it relevant to any multi-tenant AIX or VIOS deployment where untrusted users share system access. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an active local user account on the affected system with at minimum standard (low-privilege) access - confirmed by the CVSS PR:L metric. … 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:N/A:H scores 7.1 (High), driven by the dual high-impact outcomes (memory disclosure and DoS) achievable by any local standard user without additional complexity or interaction. … 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-supplied patch per IBM Security 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, identify all systems running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 in your infrastructure and assess whether they host multi-tenant workloads or untrusted user access. …
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Information Disclosure
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External POC / Exploit Code
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