EUVD-2026-63671
GHSA-jrx6-5h88-9p4q
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack requiring a won race (AC:H), low-privilege account mandatory, full OS compromise upon success with no scope change.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to gain elevated privileges due to a time-of-check to time-of-use (TOCTOU) race condition.
AnalysisAI
Local privilege escalation in IBM AIX 7.2, 7.3 and IBM PowerVM VIOS 4.1 allows a low-privileged local attacker to gain elevated - potentially root-level - privileges by winning a time-of-check to time-of-use (TOCTOU) race condition. The vulnerability carries a CVSS 7.0 score reflecting high attack complexity due to the inherent timing constraints of race condition exploitation, though successful exploitation yields total CIA impact (full system compromise). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an existing local account with at least low-privilege access (PR:L per CVSS) on the affected IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 system - this cannot be exploited remotely (AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The overall real-world risk is moderate-to-low despite the CVSS 7.0 rating. … 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 | The primary remediation is to apply the vendor-released fix available from IBM's support portal at https://www.ibm.com/support/pages/node/7283858. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all systems running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 and assess which support local user access or multi-tenant deployments. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
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