TI-2024-21053 Aliases CVE-2024-31951 GHSA-h4c3-x7vv-8q28

In the Opaque LSA Extended Link parser in FRRouting (FRR) through 9.1, there can be a…

LOW 30CWE-120Published 2024-04-07 · Updated 2024-11-04

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Will not fix Red Hat: no fix planned

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.

Summary

In the Opaque LSA Extended Link parser in FRRouting (FRR) through 9.1, there can be a buffer overflow and daemon crash in ospf_te_parse_ext_link for OSPF LSA packets during an attempt to read Segment Routing Adjacency SID subTLVs (lengths are not validated).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0054 45th percentileScored 2026-11-07

Fix Will not fix Red Hat: no fix planned

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:frrouting:frrouting::::::::	up to 9.1	Vulnerable	FRRouting

cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:* Versions up to 9.1 Vulnerable ·FRRouting

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 8	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 9	Affected	No fix planned: Will not fix

Not affected: 1 product

Red Hat Enterprise Linux 10

Timeline

2026-10-02 Threatist record created from CVE-2024-31951
2026-10-03 Alias added: GHSA-h4c3-x7vv-8q28

References

Patch 1

https://github.com/FRRouting/frr/pull/15674/commits/344fb4be2bc27316c74b17003c05ea40be395836

Other 1

https://github.com/FRRouting/frr/pull/15674/

TI-2023-20107 FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause… CVSS 3.1HIGH 7.5
TI-2023-21958 An issue was discovered in FRRouting FRR 9.0. CVSS 3.1CRITICAL 9.8
TI-2024-29658 An issue was discovered in FRRouting (FRR) through 10.1. CVSS 3.1CRITICAL 9.8
TI-2023-21957 An issue was discovered in FRRouting FRR through 9.0. CVSS 3.1CRITICAL 9.1
TI-2023-19790 bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow." CVSS 3.1CRITICAL 9.8
TI-2022-17234 An out-of-bounds read in the BGP daemon of FRRouting FRR before 8.4 may lead to a… CVSS 3.1CRITICAL 9.1

See all 47 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences