EUVD-2026-62661
GHSA-vw8q-78h4-w2gf
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Local low-privilege shell access required; S:C reflects VIOS hypervisor scope impact; no confidentiality or integrity impact observed.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Lifecycle Timeline
2DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause a denial of service due to improper handling of memory page table configurations.
AnalysisAI
IBM AIX 7.2 and 7.3, and IBM PowerVM VIOS 4.1 expose a local denial-of-service condition through improper handling of memory page table configurations (CWE-400), allowing a low-privileged local attacker to exhaust critical kernel resources and crash or hang the system. The CVSS scope-change flag (S:C) is particularly significant in PowerVM VIOS deployments, where a triggered kernel fault in the Virtual I/O Server could cascade to affect co-hosted guest partitions or the hypervisor layer itself. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local user account on the affected IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 system with at minimum low-privilege shell access (confirmed by PR:L in the CVSS vector). … 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:C/C:N/I:N/A:H, score 6.5) characterizes a local, low-complexity attack requiring only low-privilege credentials - no network access, no elevated rights. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A low-privileged user with local shell access to an IBM PowerVM VIOS 4.1 instance - such as a restricted service account or an insider threat - executes a process or operation that triggers the kernel's page table configuration handler with a malformed or resource-exhausting input, causing uncontrolled memory resource consumption. The VIOS kernel becomes unresponsive or crashes, severing I/O connectivity for all guest LPARs sharing that VIOS instance and causing a multi-system availability outage across the IBM Power chassis. … |
| Remediation | IBM has released a patch addressing this vulnerability, available through the IBM Support portal at https://www.ibm.com/support/pages/node/7283858. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
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External POC / Exploit Code
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