CVE-2025-6395 Gnutls: null pointer dereference in _gnutls_figure_common_ciphersuite()
Medium 6.5
Published
Updated
Check this codebase for CVE-2025-6395 and fix it if it is affected.
What it is: CVE-2025-6395 is a medium-severity vulnerability in Red Hat Ceph Storage 7, published on 10 Jul 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-2025-6395 in the wild and no public exploit code.
Affected product: Red Hat Ceph Storage 7. 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-2025-6395/ (Markdown: https://insights.sbomify.com/CVE-2025-6395/index.md)
A null pointer dereference in GnuTLS allows attackers to cause a denial of service via crafted TLS handshakes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-6395?
CVE-2025-6395 is a medium-severity vulnerability in Red Hat Ceph Storage 7, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A NULL pointer dereference flaw was found in the GnuTLS software in _gnutls_figure_common_ciphersuite().
Weakness: CWE-476
Which versions are affected by CVE-2025-6395?
How do I fix CVE-2025-6395?
Apply the vendor's patch.
Is CVE-2025-6395 being exploited?
There is no known exploitation of CVE-2025-6395 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2025-6395, AZL-65154, AZL-65193, BELL-CVE-2025-6395, CLSA-2025-1761844351, CLSA-2025-1762192315 and 4 more.