CVE-2025-59438 Information disclosure in n/a
Medium 5.3
Published
Updated
Check this codebase for CVE-2025-59438 and fix it if it is affected.
What it is: CVE-2025-59438 is a medium-severity vulnerability in Arm Mbed Tls, published on 21 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-59438 in the wild and no public exploit code.
Affected product: Arm Mbed Tls. 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-2025-59438/ (Markdown: https://insights.sbomify.com/CVE-2025-59438/index.md)
An attacker can exploit timing discrepancies in Mbed TLS to potentially recover sensitive cryptographic information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-59438?
CVE-2025-59438 is a medium-severity vulnerability in Arm Mbed Tls, published on 21 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Mbed TLS through 3.6.4 has an Observable Timing Discrepancy.
Weakness: CWE-208
Which versions are affected by CVE-2025-59438?
It affects 1 product.
Linux distribution packages (11)
ovmf SUSE:Linux Enterprise Module for Package Hub 15 SP7 | All versions | 202408-150700.3.15.1 |
ovmf SUSE:Linux Enterprise Module for Server Applications 15 SP7 | All versions | 202408-150700.3.15.1 |
ovmf SUSE:Linux Enterprise Server 16.0 | All versions | 202502-160000.4.1 |
ovmf SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 202502-160000.4.1 |
ovmf SUSE:Linux Micro 6.1 | All versions | 202402-slfo.1.1_2.1 |
ovmf SUSE:Linux Micro 6.2 | All versions | 202502-160000.4.1 |
micropython openSUSE:Leap 16.0 | All versions | 1.26.0-bp160.1.1 |
ovmf openSUSE:Leap 16.0 | All versions | 202502-160000.4.1 |
micropython openSUSE:Tumbleweed | All versions | 1.26.0-2.1 |
ovmf openSUSE:Tumbleweed | All versions | 202602-5.1 |
vlang openSUSE:Tumbleweed | All versions | 0.5-2.1 |
Products include Arm Mbed Tls.
How do I fix CVE-2025-59438?
Upgrade to a fixed version.
Is CVE-2025-59438 being exploited?
There is no known exploitation of CVE-2025-59438 in the wild and no public exploit code.
Other vulnerabilities in Arm Mbed Tls
Sources
Also known as ALPINE-CVE-2025-59438, DEBIAN-CVE-2025-59438, GHSA-mqc9-9p37-h763, JLSEC-2025-233, ROOT-OS-DEBIAN-12-CVE-2025-59438, SUSE-SU-2026:1413-1 and 9 more.