EUVD-2026-56524
GHSA-67gm-5g25-7xc8
Severity by source
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local-only vector (AV:L), high privilege prerequisite (PR:H), and passive user interaction (UI:R) confirmed by CVSS 4.0 source vector; scope unchanged as subsequent system impacts are all None.
Primary rating from Vendor (intel).
CVSS VectorVendor: intel
Lifecycle Timeline
1DescriptionCVE.org
Protection mechanism failure for some LLM-on-Ray before version 1.0 within Ring 3: User Applications may allow an escalation of privilege. Unprivileged software adversary with a privileged user combined with a low complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires passive user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
AnalysisAI
Privilege escalation in Intel's LLM-on-Ray framework before version 1.0 stems from a protection mechanism failure (CWE-693) within Ring 3 user-space components, allowing an attacker with high-privileged user access to escalate privileges on the local system. The attack requires local access, passive user interaction from a privileged user, and specific attack requirements (AT:P), but results in high confidentiality, integrity, and availability impact on the vulnerable system with no subsequent system scope change. No public exploit code has been identified at time of analysis, and it is not listed in the CISA KEV catalog.
Technical ContextAI
LLM-on-Ray is Intel's open-source framework for training and serving large language models atop the Ray distributed computing runtime. The vulnerability resides in Ring 3 (user-space application layer) of the CPU privilege ring model - the least-privileged execution ring where normal user applications run. CWE-693 (Protection Mechanism Failure) indicates that a security control designed to enforce isolation or access separation has been bypassed or is absent, enabling a lower-trust process to leverage a higher-privileged user context in ways the design should have prevented. The affected CPE is cpe:2.3:a:n/a:llm-on-ray:*:*:*:*:*:*:*:*, covering all pre-1.0 builds, as reported by Intel via advisory INTEL-SA-01493.
RemediationAI
The primary remediation is to upgrade LLM-on-Ray to version 1.0 or later, as versions prior to 1.0 are confirmed affected per the Intel advisory INTEL-SA-01493 (https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01493.html). An exact patch release version beyond the 'version 1.0' threshold is not independently confirmed from the provided data - consult the advisory directly for the precise patched build. As compensating controls prior to patching, restrict local system access to LLM-on-Ray deployments to only those users who strictly require it, enforce principle-of-least-privilege so that privileged user accounts interacting with LLM-on-Ray components are tightly scoped, and audit shared or service accounts with elevated rights. Disabling LLM-on-Ray services when not in active use reduces the window during which passive user interaction can be leveraged. Note that these controls reduce exposure but do not eliminate the protection mechanism failure in the software itself.
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Same weakness CWE-693 – Protection Mechanism Failure
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today