CVE-2026-37458

Missing input validation in the MPREACHNLRI component of FRRouting (FRR) stable/10.0 to stable/10.6 allows authenticated attackers to cause a Denial of Service (DoS) via supplying a crafted UPDATE message.

Database specific

{
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/37xxx/CVE-2026-37458.json"
}

References

Affected packages

Git / github.com/frrouting/frr

Affected ranges

Type

GIT

Repo

https://github.com/frrouting/frr

Events

Introduced

d5bec7b08149e9811013ba771ae6d557b396b380

Fixed

8102a8aeceb9f86fdfe1f80cd77080522bab69c8

Database specific

{
    "cpe": "cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "10.0"
        },
        {
            "last_affected": "10.6.0"
        }
    ]
}

Affected versions

base_10.*

base_10.1

base_10.2

base_10.3

base_10.4

base_10.5

base_10.6

frr-10.*

frr-10.0-dev

frr-10.2-dev

frr-10.3-dev

frr-10.4-dev

frr-10.5-dev

frr-10.6.0-dev

frr-10.7.0-dev

Database specific

vanir_signatures_modified

"2026-07-15T15:56:19Z"

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-37458.json"

vanir_signatures

[
    {
        "target": {
            "function": "bgp_mp_reach_parse",
            "file": "bgpd/bgp_attr.c"
        },
        "id": "CVE-2026-37458-dfa6f203",
        "signature_version": "v1",
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 5768.0,
            "function_hash": "168631303741082090576389693271968986211"
        },
        "source": "https://github.com/frrouting/frr/commit/8102a8aeceb9f86fdfe1f80cd77080522bab69c8"
    },
    {
        "target": {
            "file": "bgpd/bgp_attr.c"
        },
        "id": "CVE-2026-37458-fdac10ce",
        "signature_version": "v1",
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "40734328636934815047096795198079622677",
                "162827212702728829488758647699129717797",
                "203087243239154061508345748634141124641",
                "57678395295957339314315898258760419685"
            ]
        },
        "source": "https://github.com/frrouting/frr/commit/8102a8aeceb9f86fdfe1f80cd77080522bab69c8"
    }
]