Vulnerability · Published Sep 29, 2026 · Assigned by GitLab
CVE-2026-96420Buffer Over-read in Wireshark
Medium 4.7
In plain English
A medium-severity security flaw 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 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.7Medium
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
Toshiba file parser crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wireshark | no fix listed | DEBIAN-CVE-2026-96420 |
| Debian:13 | wireshark | 4.4.19-0+deb13u1 | DEBIAN-CVE-2026-96420 |
| Debian:14 | wireshark | 4.6.9-1 | DEBIAN-CVE-2026-96420 |
| Ubuntu:24.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-96420 |
| Ubuntu:26.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-96420 |
| Ubuntu:26.10 | wireshark | no fix listed | UBUNTU-CVE-2026-96420 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wireshark Foundation | Wireshark | 4.6.0 – before 4.6.94.4.0 – before 4.4.19 |
Weakness: CWE-126 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H