CVE-2026-76885

A flaw was found in Wireshark. This vulnerability, a buffer over-read, occurs when the Tektronix K12xx file parser processes a specially crafted file. A remote attacker could exploit this by convincing a user to open a malicious Tektronix K12xx file, leading to a crash of the Wireshark application and resulting in a denial of service.

A buffer over-read was found in the Tektronix K12xx file parser in Wireshark versions 4.4.0 through 4.4.18 and 4.6.0 through 4.6.7. Red Hat Enterprise Linux 6, 7, 8, and 9 ship Wireshark versions prior to the affected range and are not vulnerable. Red Hat Enterprise Linux 10 and Red Hat In-Vehicle OS ship an affected version of Wireshark.

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.

Do not open untrusted packet capture files or capture traffic from untrusted networks with Wireshark.