Denial of Service Vulnerability in Wireshark CSN.1 Protocol Dissector
CVE-2026-95393

4.7MEDIUM

Key Information:

Vendor

Wireshark
Status
Wireshark
Vendor
CVE Published:
29 September 2026

What is CVE-2026-95393?

A vulnerability in the CSN.1 protocol dissector in Wireshark versions 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 could lead to a crash, causing a denial of service. This issue arises when specially crafted CSN.1 packets are processed, which may result in the application terminating unexpectedly. Users are advised to update to the latest versions to mitigate this risk. For additional details, refer to the Wireshark security advisory at the provided references.

Affected Version(s)

Wireshark 4.6.0 < 4.6.9

Wireshark 4.4.0 < 4.4.19

References

https://www.wireshark.org/security/wnpa-sec-2026-99.html
https://gitlab.com/wireshark/wireshark/-/work_items/21510

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Security research assessment of Wireshark internals (Feng Xue)
.