Description
An integer underflow in FRRouting (FRR) stable/10.0 to stable/10.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.
References6
- github.com/FRRouting/frr/commit/693a2e02687cdc9d16501275e05136e…
- access.redhat.com/errata/RHSA-2026:24347
- access.redhat.com/errata/RHSA-2026:24370
- access.redhat.com/security/cve/CVE-2026-37459
- bugzilla.redhat.com/show_bug.cgi?id=2466513
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37459…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 32 · as of 13 November 2026
- CWE
- CWE-400CWE-191
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.