Ubuntu USN · USN-8376-1

FRR vulnerabilities

Published: Wed, 03 Jun 2026 13:15

CVE-2026-37459CVE-2026-28532CVE-2026-37458CVE-2026-37457

Summary

Several security issues were fixed in FRR.

Details

It was discovered that FRR incorrectly handled certain OSPF Traffic Engineering and Segment Routing TLVs. An attacker could possibly use this issue to cause FRR to crash, resulting in a denial of service. (CVE-2026-28532) It was discovered that FRR incorrectly handled certain BGP FlowSpec components. An attacker could possibly use this issue to cause FRR to crash, resulting in a denial of service. (CVE-2026-37457) It was discovered that FRR did not properly validate certain MP_REACH_NLRI messages. An authenticated user could possibly use this issue to cause FRR to crash, resulting in a denial of service. (CVE-2026-37458) It was discovered that FRR incorrectly handled processing certain BGP UPDATE messages. An attacker could possibly use this issue to cause FRR to crash, resulting in a denial of service. This issue only affected Ubuntu 25.04 and Ubuntu 25.10. (CVE-2026-37459)

Recommended actions per Ubuntu release

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

Ubuntu jammy

frr→8.1-1ubuntu1.16apt_upgrade
Standard apt upgrade. Install 8.1-1ubuntu1.16 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr→8.1-1ubuntu1.16apt_upgrade
Standard apt upgrade. Install 8.1-1ubuntu1.16 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-doc→8.1-1ubuntu1.16apt_upgrade
Standard apt upgrade. Install 8.1-1ubuntu1.16 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-pythontools→8.1-1ubuntu1.16apt_upgrade
Standard apt upgrade. Install 8.1-1ubuntu1.16 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-pythontools
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-rpki-rtrlib→8.1-1ubuntu1.16apt_upgrade
Standard apt upgrade. Install 8.1-1ubuntu1.16 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-rpki-rtrlib
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-snmp→8.1-1ubuntu1.16apt_upgrade
Standard apt upgrade. Install 8.1-1ubuntu1.16 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-snmp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

frr→8.4.4-1.1ubuntu6.7apt_upgrade
Standard apt upgrade. Install 8.4.4-1.1ubuntu6.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr→8.4.4-1.1ubuntu6.7apt_upgrade
Standard apt upgrade. Install 8.4.4-1.1ubuntu6.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-doc→8.4.4-1.1ubuntu6.7apt_upgrade
Standard apt upgrade. Install 8.4.4-1.1ubuntu6.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-pythontools→8.4.4-1.1ubuntu6.7apt_upgrade
Standard apt upgrade. Install 8.4.4-1.1ubuntu6.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-pythontools
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-rpki-rtrlib→8.4.4-1.1ubuntu6.7apt_upgrade
Standard apt upgrade. Install 8.4.4-1.1ubuntu6.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-rpki-rtrlib
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-snmp→8.4.4-1.1ubuntu6.7apt_upgrade
Standard apt upgrade. Install 8.4.4-1.1ubuntu6.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-snmp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

frr→10.4.1-3ubuntu1.4apt_upgrade
Standard apt upgrade. Install 10.4.1-3ubuntu1.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr→10.4.1-3ubuntu1.4apt_upgrade
Standard apt upgrade. Install 10.4.1-3ubuntu1.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-doc→10.4.1-3ubuntu1.4apt_upgrade
Standard apt upgrade. Install 10.4.1-3ubuntu1.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-pythontools→10.4.1-3ubuntu1.4apt_upgrade
Standard apt upgrade. Install 10.4.1-3ubuntu1.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-pythontools
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-rpki-rtrlib→10.4.1-3ubuntu1.4apt_upgrade
Standard apt upgrade. Install 10.4.1-3ubuntu1.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-rpki-rtrlib
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-snmp→10.4.1-3ubuntu1.4apt_upgrade
Standard apt upgrade. Install 10.4.1-3ubuntu1.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-snmp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

frr→10.5.1-1ubuntu4.1apt_upgrade
Standard apt upgrade. Install 10.5.1-1ubuntu4.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr→10.5.1-1ubuntu4.1apt_upgrade
Standard apt upgrade. Install 10.5.1-1ubuntu4.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-doc→10.5.1-1ubuntu4.1apt_upgrade
Standard apt upgrade. Install 10.5.1-1ubuntu4.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-pythontools→10.5.1-1ubuntu4.1apt_upgrade
Standard apt upgrade. Install 10.5.1-1ubuntu4.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-pythontools
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-rpki-rtrlib→10.5.1-1ubuntu4.1apt_upgrade
Standard apt upgrade. Install 10.5.1-1ubuntu4.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-rpki-rtrlib
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
frr-snmp→10.5.1-1ubuntu4.1apt_upgrade
Standard apt upgrade. Install 10.5.1-1ubuntu4.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y frr-snmp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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