EUVD-2026-62707
GHSA-47vp-xcrq-f264
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-exposed recursive path requires no authentication or user interaction; impact is purely availability loss with no confidentiality or integrity effect.
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 remote attacker to cause a denial of service due to unbounded recursion.
AnalysisAI
Unbounded recursion in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 exposes these systems to remote denial-of-service attacks requiring no authentication or user interaction. Network-reachable attackers can trigger uncontrolled resource consumption, exhausting stack or memory resources and disrupting availability of affected systems. No public exploit code has been identified and CISA KEV does not list this vulnerability; a vendor-released patch is available via IBM's support portal.
Technical ContextAI
IBM AIX is a Unix-based operating system for IBM POWER architecture hardware, widely deployed in enterprise environments across finance, government, and manufacturing sectors. PowerVM VIOS (Virtual I/O Server) is the hypervisor management layer for IBM PowerVM virtualization, handling I/O virtualisation for guest LPARs - making it a particularly sensitive target given its role as shared infrastructure for multiple virtual machines. CWE-400 (Uncontrolled Resource Consumption) covers cases where a program fails to bound recursive calls, allowing specially crafted input to drive recursion depth beyond safe limits, leading to stack exhaustion or memory depletion and ultimately a crash. The CPE identifiers cpe:2.3:a:ibm:aix:*:*:*:*:*:*:*:* and cpe:2.3:a:ibm:powervm_vios:*:*:*:*:*:*:*:* indicate the flaw spans all sub-versions within the affected major releases. The root cause is an absent recursion depth guard in a network-reachable code path.
RemediationAI
IBM has released a patch for this vulnerability; the fix details including applicable APARs and interim fixes for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1 are documented at https://www.ibm.com/support/pages/node/7283858. An exact patched version or APAR number was not present in the available input data and could not be independently confirmed - reference the advisory directly to identify the correct fileset updates and verify applicability to your maintenance level. As a compensating control prior to patching, restrict network access to the affected service using perimeter firewall rules or IP allowlisting; note that the specific network-facing service or protocol triggering the recursion was not identified in available data, which limits the precision of service-level blocking. For VIOS deployments, isolating Virtual I/O Server management interfaces from untrusted network segments is an additional defensive measure with low operational trade-off, given that VIOS management traffic should not be exposed to untrusted hosts in any hardened configuration.
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OS command injection in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 lets a remote, low-privileged authenticated attacker ru
OS command injection in IBM AIX 7.2 and 7.3 and in IBM PowerVM VIOS 4.1 lets a remote, authenticated attacker execute ar
OS command injection in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 lets a remote authenticated attacker run arbitrary commands
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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