Medium [CVE-2026-14684] Denial of Service via uncontrolled memory allocation in decodeFromByteBuffer
This medium-severity Red Hat Linux advisory covers CVE-2026-14684 affecting Red Hat Hardened Images, Logging Subsystem for Red Hat OpenShift, OpenShift Lightspeed.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
A flaw has been found in HdrHistogram up to 2.2.2. This affects the function org.
AbstractHistogram.decodeFromByteBuffer of the file src/main/java/org/HdrHistogram/AbstractHistogram.java. This manipulation of the argument numberOfSignificantValueDigits causes uncontrolled memory allocation.
The attack can only be executed locally. The exploit has been published and may be used.
The actual existence of this vulnerability is currently in question. This issue is disputed due to the potential lack of crossing of security boundaries and the pre-requisites for a successful attack.
A local attacker can exploit a vulnerability in the `decodeFromByteBuffer` function by manipulating the `numberOfSignificantValueDigits` argument. Successful exploitation requires local access, as an attacker must be able to supply specially crafted, manipulated input directly to an application that is actively utilizing the affected HdrHistogram library.
The vulnerability is strictly limited to causing a Denial of Service (DoS) via uncontrolled memory allocation. It does not allow an attacker to execute arbitrary code, escalate privileges, or access unauthorized data.
Furthermore, the impact is localized to the specific application processing the malicious input, rather than causing a broader, system-wide compromise. Red Hat severity: Low — CVSS 5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H).
Is CVE-2026-14684 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-14684 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-14684?
Upgrade to a fixed release named by Red Hat:
- netavark-main-2.0.0-1.hum1
- rust-main-1.96.1-1.hum1
- RHSA-2026:26989
- RHSA-2026:34975
Confirm against the vendor advisory before you patch.
- 2.2.2
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
- netavark-main-2.0.0-1.hum1
- rust-main-1.96.1-1.hum1
- RHSA-2026:26989
- RHSA-2026:34975
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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