← Vulnerability feed

Vulnerability record · CVE-2025-43973 · published 21 April 2025

CVE-2025-43973: Osrg gobgp vulnerability

Osrg · Gobgp

An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.

9.8 CVSS 3.1 Critical EPSS 0.56% · top 55.4% CWE-193 · CWE-193
9.8CVSS 3.1 base score
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/osrg/gobgp/commit/5693c58a4815cc6327b8d3b6980f0e5aced28abe Patch
https://github.com/osrg/gobgp/compare/v3.34.0...v3.35.0 PatchRelease Notes

Track CVE-2025-43973 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2026-42285Osrg gobgp null pointer dereference vulnerabilityGoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.4.0, an unauthenticated remote BGP …EPSS 0.61%7.5CVE-2026-41642Osrg gobgp null pointer dereference vulnerabilityGoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.3.0, a remote Denial of Service (Do…EPSS 0.61%7.5CVE-2026-41643Osrg gobgp vulnerabilityGoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Servi…EPSS 0.61%7.5CVE-2026-37461Osrg gobgp out-of-bounds read vulnerabilityAn out-of-bounds read in the ParseIP6Extended function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplyin…EPSS 0.61%7.5CVE-2026-30405Osrg gobgp uncontrolled resource consumption vulnerabilityAn issue in GoBGP gobgpd v.4.2.0 allows a remote attacker to cause a denial of service via the NEXT_HOP path attributeEPSS 0.55%7.5CVE-2025-43971Osrg gobgp vulnerabilityAn issue was discovered in GoBGP before 3.35.0. pkg/packet/bgp/bgp.go allows attackers to cause a panic via a zero value for softwareVersionLen.EPSS 0.55%7.5CVE-2025-43972Osrg gobgp vulnerabilityAn issue was discovered in GoBGP before 3.35.0. An attacker can cause a crash in the pkg/packet/bgp/bgp.go flowspec parser by sending fewer than 20 b…EPSS 0.55%6.9CVE-2026-7736Osrg gobgp vulnerabilityA vulnerability was determined in osrg GoBGP up to 4.3.0. Affected by this vulnerability is the function parseRibEntry of the file pkg/packet/mrt/mrt…EPSS 0.63%

Source: NIST National Vulnerability Database (record CVE-2025-43973), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.