A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 3 products from openbsd, from canonical, from debian organizations running these solutions should prioritize assessment and patching.
Reported in 2025, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2025-02-28T22:15:40.080
2026-06-30T01:16:23.823
Modified
CVSSv3.1: 5.9 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | openbsd | openssh | 9.5 | Yes |
| Application | openbsd | openssh | 9.6 | Yes |
| Application | openbsd | openssh | 9.6 | Yes |
| Application | openbsd | openssh | 9.7 | Yes |
| Application | openbsd | openssh | 9.7 | Yes |
| Application | openbsd | openssh | 9.8 | Yes |
| Application | openbsd | openssh | 9.8 | Yes |
| Application | openbsd | openssh | 9.9 | Yes |
| Application | openbsd | openssh | 9.9 | Yes |
| Operating System | canonical | ubuntu_linux | 24.04 | Yes |
| Operating System | canonical | ubuntu_linux | 24.10 | Yes |
| Operating System | debian | debian_linux | 11.0 | Yes |
| Operating System | debian | debian_linux | 12.0 | Yes |
| Operating System | debian | debian_linux | 13.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For openbsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.