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{"bugzilla": {"description": "wireshark: Wireshark: Denial of Service via C12.22 protocol dissector crash", "id": "2520079", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520079"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-617", "details": ["C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service", "A flaw was found in Wireshark. An unauthenticated remote attacker could exploit a vulnerability in the C12.22 protocol dissector by sending specially crafted network traffic. This could lead to a crash of the application, resulting in a Denial of Service (DoS)."], "mitigation": {"lang": "en:us", "value": "Do not populate the C12.22 decryption table, and disable the c1222.decrypt preference if crypto verification is not required. Avoid opening untrusted capture files or capturing C12.22 (TCP/1153) traffic from untrusted networks. If the C12.22 dissector is unused, disable it in protocol preferences."}, "name": "CVE-2026-76886", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "wireshark", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "wireshark", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "wireshark", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "wireshark", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "wireshark", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-19T22:35:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-76886\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-76886\nhttps://gitlab.com/wireshark/wireshark/-/work_items/21439\nhttps://www.wireshark.org/security/wnpa-sec-2026-75.html"], "statement": "This Moderate impact denial of service vulnerability in Wireshark's C12.22 protocol dissector could be triggered by processing a specially crafted capture file or analyzing malicious network traffic. Exploitation requires user interaction, such as opening a malicious file, limiting its impact in typical Red Hat deployments where Wireshark is used for network analysis rather than as a continuously exposed service.", "threat_severity": "Moderate"}