CVE-2025-43973
GoBGP does not verify that the input length
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2025-43973- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H - Weakness
- CWE-193
- Updated
- 2026-11-02
EUVDEUVD-2025-12347
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.
- Record
EUVD-2025-12347- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c5jg-wr5v-2wp2
GoBGP does not verify that the input length
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.
- Record
GHSA-c5jg-wr5v-2wp2- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H - Weakness
- CWE-193
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-43973- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-193
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2025-43973- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H - Weakness
- CWE-193
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2025-43973
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.
- Record
DEBIAN-CVE-2025-43973- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Show 5 moreShow less
OSVGHSA-c5jg-wr5v-2wp2
GoBGP does not verify that the input length
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.
- Record
GHSA-c5jg-wr5v-2wp2- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H - Weakness
- CWE-193
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-43973
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.
- Record
UBUNTU-CVE-2025-43973- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGO-2025-3633 No score
GoBGP does not verify that the input length in github.com/osrg/gobgp
GoBGP does not verify that the input length in github.com/osrg/gobgp
- Record
GO-2025-3633- Updated
- 2026-11-02
OSVopenSUSE-SU-2025:15017-1 No score
govulncheck-vulndb-0.0.20250422T181640-1.1 on GA media
These are all security issues fixed in the govulncheck-vulndb-0.0.20250422T181640-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2025:15017-1- Updated
- 2026-11-02
OSVUSN-7661-1 No score
gobgp vulnerabilities
It was discovered that GoBGP did not properly manage memory under certain circumstances, which could lead to a buffer overflow. An attacker could possibly use this issue to cause a denial of service. This issue was only addressed in Ubuntu 22.04 LTS and Ubuntu 20.04 LTS. (CVE-2023-46565)
It was discovered that GoBGP did not properly verify the length of certain inputs. An attacker could possibly use this issue to cause a panic resulting in a denial of service. (CVE-2025-43970, CVE-2025-43971, CVE-2025-43972, CVE-2025-43973)
- Record
USN-7661-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/osrg/gobgpGo |
before 3.35.0 | 3.35.0 |
github.com/osrg/gobgp/v3Go |
before 3.35.0 | 3.35.0 |
gobgpDebian:12 |
All versions, plus listed versions 3.10.0-13.16.0-13.19.0-13.21.0-13.23.0-1 Show 22 moreShow less3.25.0-13.27.0-13.28.0-13.29.0-13.30.0-13.31.0-13.32.0-13.33.0-13.35.0-13.36.0-13.36.0-24.3.0-14.4.0-14.5.0-14.5.0-1~bpo13+14.6.0-14.6.0-24.6.0-2~bpo13+14.7.0-14.7.0-1~bpo13+14.8.0-14.8.0-2~exp1 |
None known |
gobgpDebian:13 |
before 3.35.0-1 | 3.35.0-1 |
gobgpDebian:14 |
before 3.35.0-1 | 3.35.0-1 |
github.com/osrg/gobgpGo |
All versions | None known |
gobgpUbuntu:Pro:18.04:LTS |
before 1.29-1ubuntu0.1+esm1, plus listed versions 1.15-11.29-1 |
1.29-1ubuntu0.1+esm1 |
gobgpUbuntu:Pro:20.04:LTS |
before 2.12.0-1ubuntu0.1~esm2, plus listed versions 1.33-12.11.0-12.12.0-12.12.0-1ubuntu0.1~esm1 |
2.12.0-1ubuntu0.1~esm2 |
gobgpUbuntu:Pro:22.04:LTS |
before 2.25.0-3ubuntu0.1+esm2, plus listed versions 2.25.0-22.25.0-32.25.0-3build12.25.0-3ubuntu0.12.25.0-3ubuntu0.1+esm1 |
2.25.0-3ubuntu0.1+esm2 |
gobgpUbuntu:Pro:24.04:LTS |
before 3.23.0-1ubuntu0.3+esm2, plus listed versions 3.16.0-1build13.19.0-13.21.0-13.23.0-13.23.0-1ubuntu0.1 Show 4 moreShow less3.23.0-1ubuntu0.23.23.0-1ubuntu0.2+esm13.23.0-1ubuntu0.33.23.0-1ubuntu0.3+esm1 |
3.23.0-1ubuntu0.3+esm2 |
Show 5 moreShow less
| Package | Affected | Fixed |
|---|---|---|
gobgpUbuntu:Pro:18.04:LTS From an advisory covering 5 CVEs |
before 1.29-1ubuntu0.1+esm1, plus listed versions 1.15-11.29-1 |
1.29-1ubuntu0.1+esm1 |
gobgpUbuntu:Pro:20.04:LTS From an advisory covering 5 CVEs |
before 2.12.0-1ubuntu0.1~esm2, plus listed versions 1.33-12.11.0-12.12.0-12.12.0-1ubuntu0.1~esm1 |
2.12.0-1ubuntu0.1~esm2 |
gobgpUbuntu:Pro:22.04:LTS From an advisory covering 5 CVEs |
before 2.25.0-3ubuntu0.1+esm2, plus listed versions 2.25.0-22.25.0-32.25.0-3build12.25.0-3ubuntu0.12.25.0-3ubuntu0.1+esm1 |
2.25.0-3ubuntu0.1+esm2 |
gobgpUbuntu:Pro:24.04:LTS From an advisory covering 5 CVEs |
before 3.23.0-1ubuntu0.3+esm2, plus listed versions 3.16.0-1build13.19.0-13.21.0-13.23.0-13.23.0-1ubuntu0.1 Show 4 moreShow less3.23.0-1ubuntu0.23.23.0-1ubuntu0.2+esm13.23.0-1ubuntu0.33.23.0-1ubuntu0.3+esm1 |
3.23.0-1ubuntu0.3+esm2 |
govulncheck-vulndbopenSUSE:Tumbleweed From an advisory covering 23 CVEs |
before 0.0.20250422T181640-1.1 | 0.0.20250422T181640-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-43973 is a medium vulnerability (CVSS 6.8) in Gobgp, published April 21, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. Fixed in github.com/osrg/gobgp 3.35.0.
References
github.com/osrg/gobgp/compare/v3.34.0...v3.35.0
nvd.nist.gov/vuln/detail/CVE-2025-43973
security-tracker.debian.org/tracker/CVE-2025-43973
Show 32 moreShow less
ubuntu.com/security/CVE-2025-43973
cve.org/CVERecord?id=CVE-2025-43973
lists.opensuse.org/archives/list/[email protected]/thread/XCF7AZBKQYAQXK32J6F54H6NREFBK2V7
suse.com/security/cve/CVE-2019-15119