What is CVE-2023-3748?

CVE-2023-3748 is a low-severity vulnerability in Frrouting, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 3.5/10. Published 2023-07-24.

How severe is CVE-2023-3748?

Low severity. CVSS v3 base score is 3.5 out of 10.

Vulnerability in Frrouting

CVE-2023-3748

A flaw was found in FRRouting when parsing certain babeld unicast hello messages that are intended to be ignored. This issue may allow an attacker to send specially crafted hello messages with the unicast flag set, the interval field set to 0, or any TLV that contains a sub-TLV with the Mandatory flag set to enter an infinite loop and cause a denial of service.

Published 2023-07-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.008 (54.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.1% 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

Weakness classification (CWE)

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

References

access.redhat.com/security/cve/CVE-2023-3748 (Third Party Advisory, vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-3748?: CVE-2023-3748 is a low-severity vulnerability in Frrouting, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 3.5/10. Published 2023-07-24.
How severe is CVE-2023-3748?: Low severity. CVSS v3 base score is 3.5 out of 10.