CVE-2023-38802

frr: Incorrect handling of a error in parsing of an invalid section of a BGP update can de-peer a router

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · August 29, 2023

Updated · November 21, 2025

Description

A vulnerability was found in FRRouting (FRR). This flaw allows a remote attacker to cause a denial of service issue via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation).

Statement

This vulnerability is classified as important according to Red Hat's Severity Rating Classification as it allows a remote attacker to publish a crafted BGP update through the network, leading to denial of service.

https://access.redhat.com/security/updates/classification

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-20 · Improper Input Validation