CVE-2026-44250
Description
A flaw was found in netty-codec-redis. A remote attacker can exploit this vulnerability by sending a specially crafted Redis payload containing deeply nested arrays. This action forces the server to allocate a large number of state objects and collections, leading to memory exhaustion. Consequently, this can result in a Denial of Service (DoS) condition, rendering the affected server unresponsive.
Statement
This is an Important denial of service vulnerability in netty-codec-redis, affecting Red Hat products that process Redis payloads. A remote attacker can exhaust server memory by sending a crafted Redis payload with deeply nested arrays, leading to an OutOfMemoryError and rendering the service unresponsive. This impact is significant due to the potential for complete service disruption without authentication.
Mitigation
To mitigate this issue, restrict network access to services utilizing netty-codec-redis to trusted clients and networks only. Implement firewall rules to limit exposure of the Redis service or the application using it to prevent unauthenticated remote attackers from sending malicious payloads. This may impact legitimate client connections if not configured carefully. A service restart may be required for firewall rule changes to take effect.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | N/A | 7.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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