The following advisory data is extracted from:
https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_1152.json
Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.
- Packet Storm Staff
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Red Hat Security Advisory
Synopsis:           Moderate: frr security update
Advisory ID:        RHSA-2024:1152-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:1152
Issue date:         2024-03-05
Revision:           03
CVE Names:          CVE-2023-38406
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Summary: 
An update for frr is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description:
FRRouting is free software that manages TCP/IP based routing protocols. It supports BGP4, OSPFv2, OSPFv3, ISIS, RIP, RIPng, PIM, NHRP, PBR, EIGRP and BFD. 
Security Fix(es):
* ffr: Flowspec overflow in bgpd/bgp_flowspec.c (CVE-2023-38406)
* ffr: Out of bounds read in bgpd/bgp_label.c (CVE-2023-38407)
* frr: crash from specially crafted MP_UNREACH_NLRI-containing BGP UPDATE message (CVE-2023-47234)
* frr: crash from malformed EOR-containing BGP UPDATE message (CVE-2023-47235)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Solution:
https://access.redhat.com/articles/11258
CVEs:
CVE-2023-38406
References:
https://access.redhat.com/security/updates/classification/#moderate
https://bugzilla.redhat.com/show_bug.cgi?id=2248207
https://bugzilla.redhat.com/show_bug.cgi?id=2248208
https://bugzilla.redhat.com/show_bug.cgi?id=2248526
https://bugzilla.redhat.com/show_bug.cgi?id=2248528