What is CVE-2023-3649?

CVE-2023-3649 is a medium-severity vulnerability in Wireshark, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2023-07-14.

How severe is CVE-2023-3649?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Out-of-bounds Read in Wireshark

CVE-2023-3649

iSCSI dissector crash in Wireshark 4.0.0 to 4.0.6 allows denial of service via packet injection or crafted capture file

Published 2023-07-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (13.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Wireshark
Wireshark Foundation — versions 4.0.0

Weakness classification (CWE)

References

www.wireshark.org/security/wnpa-sec-2023-22.html (Vendor Advisory)
gitlab.com/wireshark/wireshark/-/issues/19164 (issue-tracking, Issue Tracking, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-3649?: CVE-2023-3649 is a medium-severity vulnerability in Wireshark, classified under Buffer Over-read. CVSS score: 5.3/10. Published 2023-07-14.
How severe is CVE-2023-3649?: Medium severity. CVSS v3 base score is 5.3 out of 10.