Description
An off-by-one out-of-bounds write vulnerability in the bgp_flowspec_op_decode() function (bgpd/bgp_flowspec_util.c) of FRRouting (FRR) stable/10.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted FlowSpec component.
Affected products
frrouting: frrouting
References8
- github.com/FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a… Patch
- access.redhat.com/errata/RHSA-2026:24340
- access.redhat.com/errata/RHSA-2026:24347
- access.redhat.com/errata/RHSA-2026:24370
- access.redhat.com/errata/RHSA-2026:24371
- access.redhat.com/security/cve/CVE-2026-37457
- bugzilla.redhat.com/show_bug.cgi?id=2464548
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37457…
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: 34 · as of 13 November 2026
- CWE
- CWE-787
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.