What is CVE-2023-38283?

CVE-2023-38283 is a medium-severity vulnerability in Openbgpd, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.3/10. Published 2023-08-29.

How severe is CVE-2023-38283?

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

Vulnerability in Openbgpd

CVE-2023-38283

In OpenBGPD before 8.1, incorrect handling of BGP update data (length of path attributes) set by a potentially distant remote actor may cause the system to incorrectly reset a session. This is fixed in OpenBSD 7.3 errata 006.

Published 2023-08-29 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.014 (70.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Openbgpd
OpenBSD — versions 7.3

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/006_bgpd.patch.sig (Patch)
github.com/openbgpd-portable/openbgpd-portable/releases/tag/8.1 (Release Notes)
blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling (Exploit, Third Party Advisory)
news.ycombinator.com/item (Mailing List)
www.openbsd.org/errata73.html (Release Notes)

Frequently asked questions

What is CVE-2023-38283?: CVE-2023-38283 is a medium-severity vulnerability in Openbgpd, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 5.3/10. Published 2023-08-29.
How severe is CVE-2023-38283?: Medium severity. CVSS v3 base score is 5.3 out of 10.