Ubuntu USN · USN-8348-1

GoBGP vulnerabilities

Published: Wed, 03 Jun 2026 04:50

CVE-2026-7737CVE-2026-37461CVE-2026-7734CVE-2026-41643CVE-2026-7735CVE-2026-7736

Summary

Several security issues were fixed in GoBGP.

Details

It was discovered that GoBGP incorrectly handled certain specially crafted BGP UPDATE messages. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of service. (CVE-2026-37461) Yanlei Wang discovered that GoBGP incorrectly handled certain malformed BGP UPDATE messages containing 4-byte AS attributes. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of service. (CVE-2026-41643) It was discovered that GoBGP incorrectly handled certain malformed BGP UPDATE messages containing SRv6 L3 Service attributes. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of service. (CVE-2026-7734) It was discovered that GoBGP incorrectly handled certain malformed BGP UPDATE messages containing Accumulated IGP (AIGP) attributes. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of service. (CVE-2026-7735) It was discovered that GoBGP incorrectly handled certain malformed Multi- threaded Routing Toolkit (MRT) routing information entries. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of service. (CVE-2026-7736) It was discovered that GoBGP incorrectly handled certain malformed Multi- threaded Routing Toolkit (MRT) headers. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of service. (CVE-2026-7737)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu bionic

gobgp→1.29-1ubuntu0.1+esm2apt_upgrade
Standard apt upgrade. Install 1.29-1ubuntu0.1+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
gobgpd→1.29-1ubuntu0.1+esm2apt_upgrade
Standard apt upgrade. Install 1.29-1ubuntu0.1+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgpd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
golang-github-osrg-gobgp-dev→1.29-1ubuntu0.1+esm2apt_upgrade
Standard apt upgrade. Install 1.29-1ubuntu0.1+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y golang-github-osrg-gobgp-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu focal

gobgp→2.12.0-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 2.12.0-1ubuntu0.1~esm3 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgp=2.12.0-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
gobgpd→2.12.0-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 2.12.0-1ubuntu0.1~esm3 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgpd=2.12.0-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
golang-github-osrg-gobgp-dev→2.12.0-1ubuntu0.1~esm3apt_upgrade_esm
Fixed at 2.12.0-1ubuntu0.1~esm3 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y golang-github-osrg-gobgp-dev=2.12.0-1ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

Ubuntu jammy

gobgp→2.25.0-3ubuntu0.1+esm4apt_upgrade
Standard apt upgrade. Install 2.25.0-3ubuntu0.1+esm4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
gobgpd→2.25.0-3ubuntu0.1+esm4apt_upgrade
Standard apt upgrade. Install 2.25.0-3ubuntu0.1+esm4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgpd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
golang-github-osrg-gobgp-dev→2.25.0-3ubuntu0.1+esm4apt_upgrade
Standard apt upgrade. Install 2.25.0-3ubuntu0.1+esm4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y golang-github-osrg-gobgp-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

gobgp→3.23.0-1ubuntu0.3+esm4apt_upgrade
Standard apt upgrade. Install 3.23.0-1ubuntu0.3+esm4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
gobgpd→3.23.0-1ubuntu0.3+esm4apt_upgrade
Standard apt upgrade. Install 3.23.0-1ubuntu0.3+esm4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgpd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
golang-github-osrg-gobgp-dev→3.23.0-1ubuntu0.3+esm4apt_upgrade
Standard apt upgrade. Install 3.23.0-1ubuntu0.3+esm4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y golang-github-osrg-gobgp-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

gobgp→3.36.0-2ubuntu0.1~esm1apt_upgrade_esm
Fixed at 3.36.0-2ubuntu0.1~esm1 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgp=3.36.0-2ubuntu0.1~esm1
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
gobgpd→3.36.0-2ubuntu0.1~esm1apt_upgrade_esm
Fixed at 3.36.0-2ubuntu0.1~esm1 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y gobgpd=3.36.0-2ubuntu0.1~esm1
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
golang-github-osrg-gobgp-dev→3.36.0-2ubuntu0.1~esm1apt_upgrade_esm
Fixed at 3.36.0-2ubuntu0.1~esm1 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y golang-github-osrg-gobgp-dev=3.36.0-2ubuntu0.1~esm1
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

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