CVE-2023-3748

Name: CVE-2023-3748
Creator: NVD / NIST
Published: 2023-07-24T16:15:13.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2023-3748 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.66%

46.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Frrouting	Frrouting	< 8.5

References

https://access.redhat.com/security/cve/CVE-2023-3748Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2223668Issue Tracking, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-3748Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2223668Issue Tracking, Third Party Advisory

Timeline

Published: Jul 24, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-3748?

How severe is CVE-2023-3748?

CVE-2023-3748 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2023-3748?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-3748?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST