Infinite loop in Wireshark - CVE-2026-96421
Published: September 24, 2026
Vulnerability identifier: #VU151891
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-96421
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an infinite loop and memory leak in the USB HID protocol dissector when processing a malformed USB HID packet. A remote attacker can inject a malformed packet onto the local network to cause a denial of service.
User interaction is required when exploitation is performed through a malformed packet trace file.
Affected software
Wireshark
openEuler
wireshark
wireshark-help
wireshark-devel
wireshark-debugsource
wireshark-debuginfo
openEuler
wireshark
wireshark-help
wireshark-devel
wireshark-debugsource
wireshark-debuginfo
How to mitigate CVE-2026-96421
Install security update from vendor's website.
Wireshark - addressed in versions 4.4.19, 4.6.9
wireshark - update to 4.4.19-1
wireshark-help - update to 4.4.19-1
wireshark-devel - update to 4.4.19-1
wireshark-debugsource - update to 4.4.19-1
wireshark-debuginfo - update to 4.4.19-1
wireshark - update to 4.4.19-1
wireshark-help - update to 4.4.19-1
wireshark-devel - update to 4.4.19-1
wireshark-debugsource - update to 4.4.19-1
wireshark-debuginfo - update to 4.4.19-1