VulnerabilityModified
CVE-2026-37457
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.
HIGH 7.5EPSS 0.39%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.39% probability · 32th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- frrouting/frrouting
- Source
- cve@mitre.org
References
- https://github.com/FRRouting/frr/commit/0e6882bc72c0278988a47b2f0f73b7a91099a25cPatch
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.