CVE catalog
CVE-2026-7736
A 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.go. Executing a manipulation can lead to integer u
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.45% · Oct 25, 2026
A 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.go. Executing a manipulation can lead to integer underflow. It is possible to launch the attack remotely. Upgrading to version 4.4.0 addresses this issue. This patch is called 76d911046344a3923cbe573364197aa081944592. It is suggested to upgrade the affected component.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | gobgp | sid | 4.8.0-1 | fixed |
| Debian | gobgp | forky | 4.8.0-1 | fixed |
| Debian | gobgp | trixie | 3.36.0-2 | vulnerable |
| Debian | gobgp | bookworm | 3.10.0-1 | vulnerable |
| Cpe | gobgp | Not reported | 3.23.0-1ubuntu0.3+esm4 | fixed |
| Cpe | gobgpd | Not reported | 3.23.0-1ubuntu0.3+esm4 | fixed |
| Cpe | golang-github-osrg-gobgp-dev | Not reported | 3.23.0-1ubuntu0.3+esm4 | fixed |
| Cpe | gobgp | Not reported | Not reported | vulnerable |
| Cpe | gobgp | Not reported | 4.4.0 | fixed |
| Go | github.com/osrg/gobgp/v4 | Not reported | 4.4.0 | fixed |
| Ubuntu | gobgp | pro | 3.36.0-2 | vulnerable |
| Ubuntu | gobgp | pro | 3.36.0-2build1 | vulnerable |
| Ubuntu | gobgp | pro | 3.36.0-2ubuntu0.1~esm1 | fixed |
| Ubuntu | gobgp | 25.10 | 3.35.0-1 | vulnerable |
| Ubuntu | gobgp | 25.10 | 3.36.0-2 | vulnerable |
| Cpe | gobgp | Not reported | 4.4.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | gobgp | source | sid | 4.4.0-1 | not yet assigned | Not reported | Not reported |
| Debian | gobgp | source | forky | 4.4.0-1 | not yet assigned | Not reported | Not reported |
| Debian | gobgp | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | gobgp | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | gobgp | cpe | Not reported | 3.23.0-1ubuntu0.3+esm4 | Not reported | Not reported | Not reported |
| Cpe | gobgpd | cpe | Not reported | 3.23.0-1ubuntu0.3+esm4 | Not reported | Not reported | Not reported |
| Cpe | golang-github-osrg-gobgp-dev | cpe | Not reported | 3.23.0-1ubuntu0.3+esm4 | Not reported | Not reported | Not reported |
| Cpe | gobgp | cpe | Not reported | 4.4.0 | Not reported | Not reported | Not reported |
| Go | github.com/osrg/gobgp/v4 | Go | Not reported | 4.4.0 | Not reported | Not reported | Not reported |
| Ubuntu | gobgp | deb | pro | 3.36.0-2ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2026-7736 | Not reported |
| Cpe | gobgp | cpe | Not reported | 4.4.0 | Not reported | NVD-CVE-2026-7736 | Not reported |
Notes
[trixie] gobgp: Minor issue [bookworm] gobgp: Minor issue, uint16 underflow in MRT RibEntry decode
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [gobgpd]Affected
Source package: [gobgp]
Details (2)
3.10.0-1+b4· amd64 · bookwormAffected
nvd · gobgp · debian · bookworm; nvd · gobgp · debian · 12
3.10.0-1+b4· arm64 · bookwormAffected
nvd · gobgp · debian · bookworm; nvd · gobgp · debian · 12
- [golang-github-osrg-gobgp-dev]Affected
Source package: [gobgp]
Details (2)
3.10.0-1· all · bookwormAffected
nvd · gobgp · debian · bookworm; nvd · gobgp · debian · 12
3.10.0-1· all · bookwormAffected
nvd · gobgp · debian · bookworm; nvd · gobgp · debian · 12
[Debian 13 (Trixie)]
- [gobgpd]Affected
Source package: [gobgp]
Details (4)
3.36.0-2+b3· amd64 · trixieAffected
nvd · gobgp · debian · 13
3.36.0-2+b3· arm64 · trixieAffected
nvd · gobgp · debian · 13
4.7.0-1~bpo13+1· amd64 · trixie-backportsAffected
nvd · gobgp · debian · 13
4.7.0-1~bpo13+1· arm64 · trixie-backportsAffected
nvd · gobgp · debian · 13
- [golang-github-osrg-gobgp-dev]Affected
Source package: [gobgp]
Details (4)
3.36.0-2· all · trixieAffected
nvd · gobgp · debian · 13
3.36.0-2· all · trixieAffected
nvd · gobgp · debian · 13
4.7.0-1~bpo13+1· all · trixie-backportsAffected
nvd · gobgp · debian · 13
4.7.0-1~bpo13+1· all · trixie-backportsAffected
nvd · gobgp · debian · 13
Observed:
References
- [https://github.com/osrg/gobgp/]
- [https://github.com/osrg/gobgp/commit/76d911046344a3923cbe573364197aa081944592]
- [https://github.com/osrg/gobgp/releases/tag/v4.4.0]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-7736]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-7736]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-7736]
- [https://pkg.go.dev/vuln/GO-2026-5427]
- [https://security-tracker.debian.org/tracker/CVE-2026-7736]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7736.json]
- [https://ubuntu.com/security/notices/USN-8348-1]
- [https://vuldb.com/submit/807604]
- [https://vuldb.com/vuln/360911]
- [https://vuldb.com/vuln/360911/cti]
[Debian Security Tracker] · [FIRST EPSS] · [Go Vulnerability Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]