EUVD-2026-62723
GHSA-mj2m-j3g3-xq98
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable unauthenticated trigger with low complexity; only availability is impacted, with no confidentiality or integrity effects applicable.
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 uncontrolled resource consumption.
AnalysisAI
Denial of service in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 enables unauthenticated remote attackers to exhaust system resources via network-delivered input, fully disabling availability (CVSS A:H) without any confidentiality or integrity impact. The vulnerability is rooted in CWE-400 uncontrolled resource consumption, triggered from the network with no authentication or user interaction required (AV:N/AC:L/PR:N/UI:N). No public exploit code or active exploitation has been identified at time of analysis; a vendor patch is available from IBM.
Technical ContextAI
IBM AIX is a Unix-based operating system running on IBM POWER hardware, with versions 7.2 and 7.3 confirmed affected per CPE cpe:2.3:a:ibm:aix:*:*:*:*:*:*:*:*. IBM PowerVM VIOS (Virtual I/O Server) 4.1, identified by cpe:2.3:a:ibm:powervm_vios:*:*:*:*:*:*:*:*, is a specialized AIX-based partition that brokers I/O resources to other logical partitions in a PowerVM virtualization environment, making its availability critical to all dependent workloads. The root cause class is CWE-400 (Uncontrolled Resource Consumption), meaning the system fails to adequately throttle or limit the consumption of finite resources - such as memory, CPU, file descriptors, or network buffers - when processing attacker-controlled input. The AV:N CVSS metric confirms the triggering input arrives over the network, pointing to a network-facing daemon or protocol handler in the AIX or VIOS stack, though the specific service is not named in available intelligence.
RemediationAI
A vendor-released patch is available from IBM. Administrators running IBM AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1 should consult the IBM advisory at https://www.ibm.com/support/pages/node/7283858 to identify the specific iFix or technology level update applicable to their environment; an exact fix version number was not independently confirmed in available intelligence and must be obtained directly from the advisory. As a compensating control where immediate patching is not feasible, restricting inbound network access to AIX and VIOS management interfaces and any non-essential network-facing services via firewall rules or network segmentation can materially reduce exposure - note that this may impact legitimate remote administration workflows and does not eliminate the vulnerability in services that must remain externally reachable. No patch-free workaround has been identified in available data beyond network-layer access restriction.
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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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