What’s Vulnerable › Vulnerabilities

CVE-2023-24545: On affected platforms running Arista CloudEOS an issue in the Software Forwarding Engine (Sfe) can lead to a potential denial of service attack by sending malformed packets to the switch.

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-12 · updated 2026-06-17
• Weakness: CWE-400

Description

On affected platforms running Arista CloudEOS an issue in the Software Forwarding Engine (Sfe) can lead to a potential denial of service attack by sending malformed packets to the switch. This causes a leak of packet buffers and if enough malformed packets are received, the switch may eventually stop forwarding traffic.

Affected products

• Arista Cloudeos: from 4.26.0 before 4.26.9m; from 4.27.0 before 4.27.8m; from 4.28.0 before 4.28.5m; from 4.29.0 before 4.29.2f — fixed in 4.26.9m, 4.27.8m, 4.28.5m, 4.29.2f

How to fix

Upgrade to a fixed version: Arista Cloudeos 4.26.9m, 4.27.8m, 4.28.5m, 4.29.2f. Check the vendor advisory for mitigations.

References

• https://www.arista.com/en/support/advisories-notices/security-advisory/17240-security-advisory-0085
• https://www.arista.com/en/support/advisories-notices/security-advisory/17240-security-advisory-0085

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