CVE-2026-76923 Out-of-bounds Read in Wireshark
An out-of-bounds read in the Bluetooth HFP dissector allows attackers to crash Wireshark, causing a 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-2026-76923?
CVE-2026-76923 is a medium-severity denial of service 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
Bluetooth HFP Profile 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-125
Which versions are affected by CVE-2026-76923?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-76923?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-76923 being exploited?
There is no known exploitation of CVE-2026-76923 in the wild and no public exploit code.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-96791, DEBIAN-CVE-2026-76923, GHSA-fqxv-r5x4-gvq7, MINI-2vf5-pvq4-xc5c, UBUNTU-CVE-2026-76923.