CVE-2026-6867
wireshark: Wireshark: Denial of service via SMB2 protocol dissector crash
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 30, 2026
Updated · July 2, 2026
Description
A flaw was found in Wireshark. A remote attacker could exploit a vulnerability in the SMB2 protocol dissector by sending a specially crafted packet. This could lead to a crash of the Wireshark application, resulting in a denial of service (DoS) for the user.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
To mitigate this issue, users should avoid opening or analyzing network capture files from untrusted sources. Additionally, when capturing live traffic, ensure the network environment is controlled and trusted to prevent exposure to malicious packets.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE-1286 · Improper Validation of Syntactic Correctness of Input