CVE-2026-76927 NULL Pointer Dereference in Wireshark
Medium 4.7
Published
Updated
Check this codebase for CVE-2026-76927 and fix it if it is affected.
What it is: CVE-2026-76927 is a medium-severity vulnerability in Wireshark Wireshark, published on 19 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-76927 in the wild and no public exploit code.
Affected product: Wireshark Wireshark. 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-2026-76927/ (Markdown: https://insights.sbomify.com/CVE-2026-76927/index.md)
A NULL pointer dereference in the H.245 dissector allows attackers to crash Wireshark, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-76927?
CVE-2026-76927 is a medium-severity vulnerability in Wireshark Wireshark, published on 19 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
H.245 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Weakness: CWE-476
Which versions are affected by CVE-2026-76927?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-76927?
Upgrade to a fixed version.
Is CVE-2026-76927 being exploited?
There is no known exploitation of CVE-2026-76927 in the wild and no public exploit code.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-96782, DEBIAN-CVE-2026-76927, GHSA-wgph-5cfp-hvhq, MINI-cjph-hq6j-c786, UBUNTU-CVE-2026-76927.