CVE-2018-14656 Information disclosure in kernel
High 7.0
Published
Updated
Check this codebase for CVE-2018-14656 and fix it if it is affected.
What it is: CVE-2018-14656 is a high-severity vulnerability in Linux kernel, published on 8 Oct 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-2018-14656 in the wild and no public exploit code.
Affected product: Linux kernel. 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-2018-14656/ (Markdown: https://insights.sbomify.com/CVE-2018-14656/index.md)
An attacker can dump arbitrary kernel memory into the dmesg log due to a missing address check, leading to information disclosure.
- 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
What is CVE-2018-14656?
CVE-2018-14656 is a high-severity vulnerability in Linux kernel, published on 8 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A missing address check in the callers of the show_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrary kernel address into the dmesg log.
Weakness: CWE-20
Which versions are affected by CVE-2018-14656?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2018-14656?
Apply the vendor's patch.
Is CVE-2018-14656 being exploited?
There is no known exploitation of CVE-2018-14656 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2018-14656, GHSA-cgpj-vcc9-76qx.