What is CVE-2023-1801?

CVE-2023-1801 is a medium-severity vulnerability in Tcpdump, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-04-07.

How severe is CVE-2023-1801?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Tcpdump

CVE-2023-1801

The SMB protocol decoder in tcpdump version 4.99.3 can perform an out-of-bounds write when decoding a crafted network packet.

Vulnerability class: Buffer Overflow

Published 2023-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Tcpdump — versions 4.99.3
The Tcpdump Group — versions 4.99.3

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

Frequently asked questions

What is CVE-2023-1801?: CVE-2023-1801 is a medium-severity vulnerability in Tcpdump, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2023-04-07.
How severe is CVE-2023-1801?: Medium severity. CVSS v3 base score is 6.5 out of 10.