FRRouting FRR 10.0 FlowSpec bgpd/bgp_flowspec_util.c bgp_flowspec_op_decode off-by-one

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in FRRouting FRR 10.0. It has been rated as problematic. The affected element is the function bgp_flowspec_op_decode of the file bgpd/bgp_flowspec_util.c of the component FlowSpec. The manipulation leads to off-by-one. This vulnerability is listed as CVE-2026-37457. There is no available exploit. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in FRRouting FRR 10.0. It has been rated as problematic. This issue affects the function bgp_flowspec_op_decode of the file bgpd/bgp_flowspec_util.c of the component FlowSpec. The manipulation with an unknown input leads to a off-by-one vulnerability. Using CWE to declare the problem leads to CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-37457 since 04/06/2026. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 319644 (RHEL 10 : frr (RHSA-2026:24347)), which helps to determine the existence of the flaw in a target environment.

Applying the patch 0e6882bc72c0278988a47b2f0f73b7a91099a25c is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (319644) and EUVD (EUVD-2026-26703). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 319644
Nessus Name: RHEL 10 : frr (RHSA-2026:24347)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 0e6882bc72c0278988a47b2f0f73b7a91099a25c

Timelineinfo

04/06/2026 CVE reserved
05/01/2026 +25 days Advisory disclosed
05/01/2026 +0 days VulDB entry created
06/08/2026 +38 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 0e6882bc72c0278988a47b2f0f73b7a91099a25c
Status: Confirmed

CVE: CVE-2026-37457 (🔒)
GCVE (CVE): GCVE-0-2026-37457
GCVE (VulDB): GCVE-100-360773
EUVD: 🔒

Entryinfo

Created: 05/01/2026 20:14
Updated: 06/08/2026 14:10
Changes: 05/01/2026 20:14 (59), 05/01/2026 21:27 (2), 06/01/2026 03:37 (11), 06/08/2026 14:10 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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