CVE-2026-5107 Details
Description
A vulnerability has been found in FRRouting FRR up to 10.5.1. This affects the function process_type2_route of the file bgpd/bgp_evpn.c of the component EVPN Type-2 Route Handler. The manipulation leads to improper access controls. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is reported as difficult. The identifier of the patch is 7676cad65114aa23adde583d91d9d29e2debd045. To fix this issue, it is recommended to deploy a patch.
A vulnerability exists in FRRouting (FRR) versions through 10.5.1, specifically within the BGP daemon's EVPN Type-2 Route Handler. The issue arises in the 'process_type2_route' function of 'bgpd/bgp_evpn.c', where improper input validation allows for access control vulnerabilities. This flaw can be exploited remotely by authenticated attackers who are legitimate BGP peers with L2VPN EVPN enabled. The vulnerability stems from an inconsistent validation between the NLRI length-related fields, 'psize' and 'ipaddr_len'. While each field is individually checked, the implementation fails to ensure they are semantically aligned, enabling crafted EVPN Type-2 routes to bypass validation and disrupt EVPN routing information, potentially causing VNI label poisoning and incorrect tenant-to-VNI mapping.
Users are advised to update to FRRouting FRR version 10.5.2 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FRRouting/frr/ | [email protected] | Product |
| https://github.com/FRRouting/frr/commit/7676cad65114aa23adde583d91d9d29e2debd045 | [email protected] | Patch |
| https://github.com/FRRouting/frr/pull/21098 | [email protected] | Issue TrackingPatch |
| https://vuldb.com/submit/780123 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354132 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354132/cti | [email protected] | Permissions RequiredVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-266 | Incorrect Privilege Assignment | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| frrouting frrouting | 10.5.0 10.5.1 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Initial Analysis | [email protected] |
| Mar 30, 2026 | New CVE Received | [email protected] |