Vulnerability · Published Sep 3, 2025 · Assigned by GitLab
CVE-2025-9817NULL Pointer Dereference in Wireshark
High 7.8
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 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 89.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
SSH dissector crash in Wireshark 4.4.0 to 4.4.8 allows denial of service
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | wireshark | 1:4.4.2-4.el10_1.2 | ALSA-2026:1714 |
| AlmaLinux:10 | wireshark-cli | 1:4.4.2-4.el10_1.2 | ALSA-2026:1714 |
| AlmaLinux:10 | wireshark-devel | 1:4.4.2-4.el10_1.2 | ALSA-2026:1714 |
| Debian:12 | wireshark | 4.0.17-0+deb12u2 | DEBIAN-CVE-2025-9817 |
| Debian:13 | wireshark | 4.4.13-0+deb13u1 | DEBIAN-CVE-2025-9817 |
| Debian:13 | wireshark | 4.4.13-0+deb13u1 | DSA-6124-1 |
| Debian:14 | wireshark | 4.4.9-1 | DEBIAN-CVE-2025-9817 |
| Rocky Linux:10 | wireshark | 1:4.4.2-4.el10_1.2 | RLSA-2026:1714 |
| Ubuntu:24.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2025-9817 |
| Ubuntu:25.10 | wireshark | no fix listed | UBUNTU-CVE-2025-9817 |
| Ubuntu:26.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2025-9817 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wireshark Foundation | Wireshark | 4.4.0 – before 4.4.9 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://www.wireshark.org/security/wnpa-sec-2025-03.html
- GitLab Issue #20642 issue-tracking, permissions-required