Out-of-bounds read in Arista EOS
Priority MEDIUM 40CWE-126Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-126 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00682 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Arista | EOS | 4.29.0 – 4.29.1F; 4.28.0 – 4.28.5M; 4.27.0 – 4.27.8M; 4.26.0 – 4.26.9M | — | No fix listed | CNA |
- EOS VendorArista Affected 4.29.0 – 4.29.1F; 4.28.0 – 4.28.5M; 4.27.0 – 4.27.8M; 4.26.0 – 4.26.9M Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:arista:cloudeos:*:*:*:*:*:*:*:* | 4.26.0 to before 4.26.9m; 4.27.0 to before 4.27.8m; 4.28.0 to before 4.28.5m; 4.29.0 to before 4.29.2f | Vulnerable | Arista |
| cpe:2.3:a:amazon:aws_marketplace:-:*:*:*:*:*:*:* | not specified by NVD | Running on | AWS |
| cpe:2.3:a:equinix:network_edge:-:*:*:*:*:*:*:* | not specified by NVD | Running on | — |
| cpe:2.3:a:google:google_cloud_platform_marketplace:-:*:*:*:*:*:*:* | not specified by NVD | Running on | |
| cpe:2.3:a:microsoft:azure_marketplace:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:h:arista:dca-200-veos:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arista |
- cpe:2.3:a:arista:cloudeos:*:*:*:*:*:*:*:* Versions 4.26.0 to before 4.26.9m; 4.27.0 to before 4.27.8m; 4.28.0 to before 4.28.5m; 4.29.0 to before 4.29.2f Vulnerable ·Arista
- cpe:2.3:a:amazon:aws_marketplace:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·AWS
- cpe:2.3:a:equinix:network_edge:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·—
- cpe:2.3:a:google:google_cloud_platform_marketplace:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Google
- cpe:2.3:a:microsoft:azure_marketplace:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:h:arista:dca-200-veos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arista
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-24513
- 2026-10-03 Alias added: GHSA-c6gg-q5f6-74fh
References
More Arista Cloudeos vulnerabilities
- TI-2023-10133 Improper access control in Arista Terminattr CVSS 3.1HIGH 8.8
- TI-2023-10164 Uncontrolled resource consumption in Arista EOS CVSS 3.1HIGH 7.5
- TI-2020-09323 A vulnerability exists in Arista’s Cloud EOS VM / vEOS 4.23.2M and below releases in the… CVSS 3.1HIGH 7.5
Sources
- CVE-2023-24513 · CVE Program
- CVE-2023-24513 · NVD
- FIRST EPSS
- GHSA-c6gg-q5f6-74fh · GitHub Advisory Database · CC BY 4.0
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