CVE-2020-14386 Memory corruption in kernel
Medium 6.7
Published
Updated
Check this codebase for CVE-2020-14386 and fix it if it is affected.
What it is: CVE-2020-14386 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 16 Sep 2020. 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-2020-14386 in the wild and no public exploit code.
Affected product: Debian Debian 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-2020-14386/ (Markdown: https://insights.sbomify.com/CVE-2020-14386/index.md)
Memory corruption in the Linux kernel allows unprivileged processes to gain root privileges, compromising data confidentiality and integrity.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-14386?
CVE-2020-14386 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 16 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the Linux kernel before 5.9-rc4. Memory corruption can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.
Which versions are affected by CVE-2020-14386?
It affects 4 products.
Linux distribution packages (34)
kernel-default SUSE:Linux Enterprise High Availability Extension 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-default SUSE:Linux Enterprise Live Patching 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-livepatch-SLE15-SP2_Update_3 SUSE:Linux Enterprise Live Patching 15 SP2 | All versions | 1-5.3.1 |
kernel-default SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-preempt SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-source SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-docs SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 5.3.18-24.15.2 |
kernel-obs-build SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-preempt SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-source SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-syms SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-default SUSE:Linux Enterprise Module for Legacy 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-azure SUSE:Linux Enterprise Module for Public Cloud 15 SP1 | All versions | 4.12.14-8.44.1 |
kernel-source-azure SUSE:Linux Enterprise Module for Public Cloud 15 SP1 | All versions | 4.12.14-8.44.1 |
kernel-syms-azure SUSE:Linux Enterprise Module for Public Cloud 15 SP1 | All versions | 4.12.14-8.44.1 |
kernel-azure SUSE:Linux Enterprise Module for Public Cloud 15 SP2 | All versions | 5.3.18-18.18.1 |
kernel-source-azure SUSE:Linux Enterprise Module for Public Cloud 15 SP2 | All versions | 5.3.18-18.18.1 |
kernel-syms-azure SUSE:Linux Enterprise Module for Public Cloud 15 SP2 | All versions | 5.3.18-18.18.1 |
kernel-azure SUSE:Linux Enterprise Server 12 SP5 | All versions | 4.12.14-16.28.1 |
kernel-source-azure SUSE:Linux Enterprise Server 12 SP5 | All versions | 4.12.14-16.28.1 |
kernel-syms-azure SUSE:Linux Enterprise Server 12 SP5 | All versions | 4.12.14-16.28.1 |
kernel-azure SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 4.12.14-16.28.1 |
kernel-source-azure SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 4.12.14-16.28.1 |
kernel-syms-azure SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 4.12.14-16.28.1 |
kernel-default SUSE:Linux Enterprise Workstation Extension 15 SP2 | All versions | 5.3.18-24.15.1 |
kernel-debug openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.2 |
kernel-default openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.2 |
kernel-docs openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.3 |
kernel-kvmsmall openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.2 |
kernel-obs-build openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.2 |
kernel-obs-qa openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.2 |
kernel-source openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.1 |
kernel-syms openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.1 |
kernel-vanilla openSUSE:Leap 15.1 | All versions | 4.12.14-lp151.28.67.2 |
Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Opensuse Leap.
How do I fix CVE-2020-14386?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-14386 being exploited?
There is no known exploitation of CVE-2020-14386 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-14386, LSN-0071-1, SUSE-SU-2020:2577-1, SUSE-SU-2020:2578-1, SUSE-SU-2020:2579-1, SUSE-SU-2020:2580-1 and 3 more.