CVE-2025-43972 json
GoBGP crashes in the flowspec parser
published 2025-04-21 18 mo ago modified 2026-09-10 1 mo ago also EUVD-2025-12348 , GHSA-mfvv-mgf6-q25r , GO-2025-3632
- cvss
- 6.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
An 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 bytes in a certain context.
Patch / fix
- go github.com/osrg/gobgp/v3 3.35.0
- GoBGP GoBGP 3.35.0
- gobgp Debian 14, Debian 13 3.35.0-1
debian advisories DEBIAN-CVE-2025-43972
- gobgp Ubuntu Pro 18.04 LTS 1.29-1ubuntu0.1+esm1
- gobgp Ubuntu Pro 20.04 LTS 2.12.0-1ubuntu0.1~esm2
- gobgp Ubuntu Pro 22.04 LTS 2.25.0-3ubuntu0.1+esm2
- gobgp Ubuntu Pro 24.04 LTS 3.23.0-1ubuntu0.3+esm2
ubuntu advisories UBUNTU-CVE-2025-43972
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- govulncheck-vulndb openSUSE Tumbleweed 0.0.20250422T181640-1.1
opensuse advisories openSUSE-SU-2025:15017-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H |
| GitHub | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/osrg/gobgp | all versions |
no fix listed |
| go | github.com/osrg/gobgp/v3 | <3.35.0 |
3.35.0 |
Affected products
- GoBGP GoBGP
Classification
- Weakness
-
- CWE-1284 Improper Validation of Specified Quantity in Input
References
-
github.com
/osrg/gobgp/commit/ca7383f450f7b296c5389feceef2467de5ab6e5a
web, patch
-
github.com
/osrg/gobgp/compare/v3.34.0...v3.35.0
web, patch, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2025-43972
advisory
-
github.com
/osrg/gobgp
package
-
github.com
/advisories/GHSA-mfvv-mgf6-q25r
advisory
Sources
- CVE List CVE-2025-43972
- GitHub Advisory GHSA-mfvv-mgf6-q25r
- NVD CVE-2025-43972
- OSV GO-2025-3632
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.