EUVD-2026-63739
GHSA-5w7c-9hff-vv9j
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Description states an authenticated attacker so PR:L (not PR:N); network vector and low complexity retained, with high confidentiality and availability impact but no integrity impact.
Primary rating from Vendor (us).
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to obtain sensitive information or cause a denial of service due to an out-of-bounds read.
AnalysisAI
Information disclosure and denial of service in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 stem from an out-of-bounds read (CWE-125) reachable over the network, letting a remote attacker read sensitive memory contents or crash the affected service. The vulnerability carries a CVSS 9.1 rating driven by high confidentiality and availability impact, though EPSS places exploitation probability very low (0.19%, 10th percentile) and CISA's SSVC framework records no known exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the vulnerable AIX/VIOS network-facing service and the ability to send a crafted request that triggers the out-of-bounds read; the CVSS 3.1 vector (AV:N/AC:L/UI:N) indicates no user interaction and low complexity. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H) describes a network-reachable, low-complexity, no-interaction issue with high confidentiality and availability impact, which yields the 9.1 'Critical' score. … 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 | Patch available per vendor advisory: apply the fixes referenced in IBM support document https://www.ibm.com/support/pages/node/7283858 (no exact fixed version string is provided in the available data - obtain the correct APAR/ifix and TL/SP level for your AIX 7.2, 7.3, or VIOS 4.1 build directly from that advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: conduct a complete inventory of IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 deployments across your infrastructure and document all network paths; implement firewall rules and network segmentation to restrict external access to these systems and disable non-essential network-facing services. …
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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