# CVE-2026-21387: CVE-2026-21387

Status: published. Published: 2026-08-11. Updated: 2026-11-02.

Protection mechanism failure for some Intel(R) LLM Library for PyTorch 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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- intel / llm_library_for_pytorch: ≤ 2.3.0 (affected, custom). Source: NVD

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:intel:llm_library_for_pytorch:*:*:*:*:*:*:*:*",
            "versionEndIncluding": "2.3.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 4.0: 5.4 (medium); 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; source: NVD: secure@intel.com

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H; source: NVD: nvd@nist.gov

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-693

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01465.html (secure@intel.com; Vendor Advisory)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21387; retrieved 2026-11-02; source updated 2026-11-02

Revision: c24173856521050b88a33c7103e87b087f16e3f4f4828fad1a7e8b0e5e26b725

Canonical: https://y2.dev/cve/CVE-2026-21387

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