CVE-2026-37457

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-01 · updated 2026-07-15
Weakness: CWE-787

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: 10.0

References

https://github.com/FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a91099a25c
https://access.redhat.com/errata/RHSA-2026:24340
https://access.redhat.com/errata/RHSA-2026:24347
https://access.redhat.com/errata/RHSA-2026:24370
https://access.redhat.com/errata/RHSA-2026:24371
https://access.redhat.com/security/cve/CVE-2026-37457
https://bugzilla.redhat.com/show_bug.cgi?id=2464548
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-37457.json

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