EUVD-2026-67948
GHSA-6rjg-22x4-mfvp
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack requiring existing low-privilege account; AC:H reflects exploitation complexity typical of format string memory-write primitives on hardened POWER/AIX environments.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
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 format string vulnerability.
AnalysisAI
Local privilege escalation in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 stems from a format string vulnerability (CWE-134), enabling a low-privileged local attacker to achieve full system compromise - high confidentiality, integrity, and availability impact consistent with root-level access. The CVSS vector (AV:L/AC:H/PR:L) confirms this requires existing local access and elevated attack complexity, limiting opportunistic exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an existing low-privileged local account on the target IBM AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1 system - CVSS PR:L confirms at least a valid user session is needed; unauthenticated or remote-only attackers cannot directly exploit this. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.0 with vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H places this in the High severity tier, but several factors moderate the realistic exploitation urgency. … 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 | IBM has released a patch addressing this vulnerability; apply the fix by following the IBM support advisory at https://www.ibm.com/support/pages/node/7283858, which should specify the exact Technology Level (TL) or Service Pack (SP) required for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems currently deployed, and implement access controls restricting local user privileges to reduce attack surface. …
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Same weakness CWE-134 – Use of Externally-Controlled Format String
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External POC / Exploit Code
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