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Ubuntu 25.10 Frr Severe DoS Vulnerabilities USN-8046-1 Released

ubuntu
Calendar Grey February 17, 2026
Dist Ubuntu Esm H88
Critical security issues in FRR on Ubuntu distributions require immediate updates to prevent denial of service.
Several security issues were fixed in FRR.

Summary

Several security issues were fixed in FRR.

Software Description:

- frr: FRRouting suite of internet protocols

Details:

It was discovered that FRR incorrectly handled certain malformed OSPF and

update packets. A remote attacker could possibly use these issues to cause

FRR to crash, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu Linux application frr

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  frr                             10.4.1-3ubuntu1.1

Ubuntu 24.04 LTS
  frr                             8.4.4-1.1ubuntu6.5

Ubuntu 22.04 LTS
  frr                             8.1-1ubuntu1.14

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8046-1

CVE-2025-61099, CVE-2025-61100, CVE-2025-61101, CVE-2025-61102,

CVE-2025-61103, CVE-2025-61104, CVE-2025-61105, CVE-2025-61106,

CVE-2025-61107

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8046-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu Linux application frr

Package Information

https://launchpad.net/ubuntu/+source/frr/8.1-1ubuntu1.14

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