CVE-2026-96423
Heap-based Buffer Overflow in Wireshark
Wireshark Foundation Wireshark
CVSS
5.5MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.13%Chance of exploitation activity in the next 30 days, higher than 2% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Text from CVE List
Affected versions 2
- Wiresharkaffected: 4.6.0 before 4.6.9CVE List
- Wiresharkaffected: 4.4.0 before 4.4.19CVE List