Vulnerability · Published May 27, 2026 · Assigned by GitLab
CVE-2026-9759NULL Pointer Dereference in Wireshark
Medium 5.5
In plain English
A medium-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 0.1% (higher than 0% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)<0.1%top 99.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
ROHC protocol dissector crash in Wireshark 4.6.0 to 4.6.5 and 4.4.0 to 4.4.15 allows denial of service
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wireshark | no fix listed | DEBIAN-CVE-2026-9759 |
| Debian:13 | wireshark | 4.4.16-0+deb13u1 | DEBIAN-CVE-2026-9759 |
| Debian:14 | wireshark | 4.6.6-1 | DEBIAN-CVE-2026-9759 |
| Ubuntu:24.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-9759 |
| Ubuntu:25.10 | wireshark | no fix listed | UBUNTU-CVE-2026-9759 |
| Ubuntu:26.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-9759 |
| Ubuntu:26.10 | wireshark | no fix listed | UBUNTU-CVE-2026-9759 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wireshark Foundation | Wireshark | 4.6.0 – before 4.6.64.4.0 – before 4.4.16 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H