EUVD-2026-63643
GHSA-xc9p-mj64-29x8
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Remote unauthenticated network trigger with no user interaction (AV:N/AC:L/PR:N/UI:N); high confidentiality from kernel memory leak and high availability from crash, no integrity impact.
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 remote attacker to obtain sensitive information and cause a denial of service due to a kernel heap over-read.
AnalysisAI
Information disclosure and denial of service in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 arise from a kernel heap over-read that a remote attacker can trigger without authentication or user interaction. Successful exploitation leaks sensitive kernel memory contents and can crash the affected system, and the CVSS 9.1 rating reflects the combined high confidentiality and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the CVSS vector (AV:N/AC:L/PR:N/UI:N), no special conditions are required beyond network reachability - remote unauthenticated exploitation is possible against affected IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems with no user interaction. … 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 remote, low-complexity, unauthenticated attack with no user interaction, which drives the 9.1 base score through high confidentiality and availability 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 fix documented in IBM's advisory at https://www.ibm.com/support/pages/node/7283858, which is confirmed available from the vendor; consult that page for the exact iFix/APAR level applicable to your AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1 release, as the input data does not enumerate a specific patched build number. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and document all systems running AIX 7.2, 7.3, or PowerVM VIOS 4.1 and assess network accessibility. …
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Same weakness CWE-200 – Information Exposure
View allSame technique Denial Of Service
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External POC / Exploit Code
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