# CVE-2025-21096: Privilege escalation in Intel(R) TDX

> A privileged local user can escalate privileges due to improper buffer restrictions in Intel TDX firmware.

- **Severity:** Low 2.0 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Aug 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-f9vg-w87m-3hqm

## What is CVE-2025-21096?

CVE-2025-21096 is a low-severity vulnerability in Intel(R) TDX, published on 12 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Improper buffer restrictions in the firmware for some Intel(R) TDX may allow a privileged user to potentially enable escalation of privilege via local access.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-21096?


## How do I fix CVE-2025-21096?

No fix has been published for CVE-2025-21096 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-21096 being exploited?

There is no known exploitation of CVE-2025-21096 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-21096 and fix it if it is affected.

What it is: CVE-2025-21096 is a low-severity vulnerability in Intel(R) TDX, published on 12 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-21096 in the wild and no public exploit code.

Affected product: Intel(R) TDX. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-21096/ (Markdown: https://insights.sbomify.com/CVE-2025-21096/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-21096
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21096
- OSV: https://osv.dev/vulnerability/CVE-2025-21096

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-21096/
Summaries are generated and may contain mistakes; the official description above is the record.