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VulnerabilityPublished

CVE-2024-55553: frr regression

Affects frrSource GCVE Database

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Not known to be exploited · fixed in 7.2.1-1ubuntu0.2+esm5 : patch frr soon.

Data as of 6 Nov 2026, 02:05 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch
Available – fixed in 7.2.1-1ubuntu0.2+esm5, 8.1-1ubuntu1.17, 8.4.4-1.1ubuntu6.8

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade the Ubuntu frr to 7.2.1-1ubuntu0.2+esm5 (package) or 8.1-1ubuntu1.17 (package) or 8.4.4-1.1ubuntu6.8 (package).

Affected software

ProductAffectedFixed in
Ubuntu 24.04 LTSfrrpkg:deb/ubuntu/frr?arch=source&distro=nobleOther threatsAffected
  • <8.4.4-1.1ubuntu6.8
Fixed in
  • 8.4.4-1.1ubuntu6.8
Ubuntu 22.04 LTSfrrpkg:deb/ubuntu/frr?arch=source&distro=jammyOther threatsAffected
  • <8.1-1ubuntu1.17
Fixed in
  • 8.1-1ubuntu1.17
Ubuntu Pro 20.04 LTSfrrpkg:deb/ubuntu/frr?arch=source&distro=esm-apps/focalOther threatsAffected
  • <7.2.1-1ubuntu0.2+esm5
Fixed in
  • 7.2.1-1ubuntu0.2+esm5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and users should update to the following package versions: 7.2.1-1ubuntu0.2+esm5 for Ubuntu 20.04 LTS, 8.1-1ubuntu1.17 for Ubuntu 22.04 LTS, and 8.4.4-1.1ubuntu6.8 for Ubuntu 24.04 LTS. Standard system updates will apply the necessary changes. Ubuntu Pro users can obtain fixes via ESM Apps. No additional mitigation actions are required beyond applying these updates.

Description

A regression introduced in FRR after fixing CVE-2024-55553 caused the software to stop processing RPKI updates after the first one, preventing route revalidation when RPKI data changed. Additionally, on Ubuntu 20.04 LTS, the BGP daemon failed to start when the RPKI module was enabled. This issue was fixed in updated FRR package versions.

References

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