CVE-2026-106449
Description
A flaw was found in lz4-java. This issue can lead to a Denial of Service (DoS) when the LZ4 input stream is configured not to stop upon encountering empty blocks. In this non-default configuration, consecutive empty blocks are processed via recursive calls rather than iterative handling. A remote attacker can exploit this vulnerability by supplying a crafted compressed stream containing a long sequence of empty blocks, exhausting the thread's memory stack and causing the application to crash.
Statement
This vulnerability is rated with a Low severity impact on Red Hat products because triggering the condition depends on non-default stream configuration parameters and the resulting impact is confined to a denial of service via thread stack exhaustion. Standard deployments utilize default decoding options that halt upon encountering zero-length blocks, inherently preventing recursive processing of malicious inputs. Furthermore, even when improperly configured, processing malformed streams causes a localized thread crash without leading to privilege escalation, arbitrary code execution, or memory corruption.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.7 | N/A | 3.7 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | High |
| 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 | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
