Vulnerability · Published Aug 19, 2026 · Assigned by GitLab
CVE-2026-76928NULL Pointer Dereference in Wireshark
High 7.5
In plain English
A high-severity null pointer dereference in Wireshark from Wireshark Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 75.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
X.509IF protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | wireshark | 1:4.4.2-10.el10_2.8 | ALSA-2026:84721 |
| AlmaLinux:10 | wireshark-cli | 1:4.4.2-10.el10_2.8 | ALSA-2026:84721 |
| AlmaLinux:10 | wireshark-devel | 1:4.4.2-10.el10_2.8 | ALSA-2026:84721 |
| Debian:12 | wireshark | no fix listed | DEBIAN-CVE-2026-76928 |
| Debian:13 | wireshark | 4.4.18-0+deb13u1 | DEBIAN-CVE-2026-76928 |
| Debian:14 | wireshark | 4.6.9-1 | DEBIAN-CVE-2026-76928 |
| Rocky Linux:10 | wireshark | 1:4.4.2-10.el10_2.8 | RLSA-2026:84721 |
| Ubuntu:24.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-76928 |
| Ubuntu:26.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-76928 |
| Ubuntu:26.10 | wireshark | no fix listed | UBUNTU-CVE-2026-76928 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wireshark Foundation | Wireshark | 4.6.0 – before 4.6.84.4.0 – before 4.4.18 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H