# CVE-2018-3693: Information disclosure in Most Modern Operating Systems

> Local attackers can exploit speculative execution flaws to read sensitive memory data via side-channel analysis on affected systems.

- **Severity:** Medium 5.6 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N`)
- **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:** Yes
- **Published:** 10 Jul 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-3693, GHSA-v5hg-j44c-8mvh, UBUNTU-CVE-2018-3693

## What is CVE-2018-3693?

CVE-2018-3693 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 10 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a speculative buffer overflow and side-channel analysis.

## Which versions are affected by CVE-2018-3693?

It affects 225 products.


Products: Arm Cortex-A, Arm Cortex-R, Fujitsu M12-1 Firmware, Fujitsu M12-2 Firmware, Fujitsu M12-2s Firmware, Intel Atom C, Intel Atom E, Intel Atom X3, Intel Atom Z, Intel Celeron J, Intel Celeron N, Intel Core I3, Intel Core I5, Intel Core I7, Intel Core M, Intel Core M3, Intel Core M5, Intel Core M7, Intel Pentium J, Intel Pentium N and 205 more.

## How do I fix CVE-2018-3693?

Apply the vendor's patch.

## Is CVE-2018-3693 being exploited?

There is no known exploitation of CVE-2018-3693 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Enterprise Linux

- [CVE-2018-3640](https://insights.sbomify.com/CVE-2018-3640/): Information disclosure in Multiple (medium 5.6)
- [CVE-2018-9056](https://insights.sbomify.com/CVE-2018-9056/): Information disclosure in n/a (medium 5.6)
- [CVE-2017-5715](https://insights.sbomify.com/CVE-2017-5715/): Information disclosure in Microprocessors with Speculative Execution (medium 5.6)
- [CVE-2017-5754](https://insights.sbomify.com/CVE-2017-5754/): Information disclosure in Most Modern Operating Systems (medium 5.6)
- [CVE-2018-3639](https://insights.sbomify.com/CVE-2018-3639/): Information disclosure in Multiple (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-3693 and fix it if it is affected.

What it is: CVE-2018-3693 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 10 Jul 2018. 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-2018-3693 in the wild and no public exploit code.

Affected product: Redhat Enterprise Linux. 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-2018-3693/ (Markdown: https://insights.sbomify.com/CVE-2018-3693/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-3693
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-3693
- OSV: https://osv.dev/vulnerability/CVE-2018-3693

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-3693/
Summaries are generated and may contain mistakes; the official description above is the record.