What is CVE-2018-9257?

CVE-2018-9257 is a high-severity vulnerability in Wireshark, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2018-04-04.

How severe is CVE-2018-9257?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Wireshark

CVE-2018-9257

In Wireshark 2.4.0 to 2.4.5, the CQL dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-cql.c by checking for a nonzero number of columns.

Published 2018-04-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.018 (78.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.018 · change: -0.000

Affected products

Wireshark

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

code.wireshark.org/review/gitweb
bugs.wireshark.org/bugzilla/show_bug.cgi (Exploit, Issue Tracking)
www.wireshark.org/security/wnpa-sec-2018-22.html (Vendor Advisory)

Frequently asked questions

What is CVE-2018-9257?: CVE-2018-9257 is a high-severity vulnerability in Wireshark, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2018-04-04.
How severe is CVE-2018-9257?: High severity. CVSS v3 base score is 7.5 out of 10.