# CVE-2025-27723: Use after free in Intel(R) Ethernet 800 series

> A use-after-free flaw in the Intel Ethernet 800 series kernel driver allows local attackers to cause a denial of service.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 May 2026
- **Updated:** 12 May 2026
- **Also known as:** GHSA-j2j9-q468-5q3f

## What is CVE-2025-27723?

CVE-2025-27723 is a medium-severity use after free vulnerability in Intel(R) Ethernet 800 series, published on 12 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Use after free for some Linux kernel driver for the Intel(R) Ethernet 800 series before version 2.3.14 within Ring 0: Kernel may allow a denial of service. Unprivileged software adversary with an authenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (high) impacts.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2025-27723?


## How do I fix CVE-2025-27723?

No fix has been published for CVE-2025-27723 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-27723 being exploited?

There is no known exploitation of CVE-2025-27723 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27723 and fix it if it is affected.

What it is: CVE-2025-27723 is a medium-severity use after free vulnerability in Intel(R) Ethernet 800 series, published on 12 May 2026. 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-2025-27723 in the wild and no public exploit code.

Affected product: Intel(R) Ethernet 800 series. 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-2025-27723/ (Markdown: https://insights.sbomify.com/CVE-2025-27723/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27723
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27723
- OSV: https://osv.dev/vulnerability/CVE-2025-27723

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27723/
Summaries are generated and may contain mistakes; the official description above is the record.