Is CVE-2023-26964 actively exploited?

CVE-2023-26964 has no public evidence of in-the-wild exploitation as of 2025-02-11.

What is the CVSS score for CVE-2023-26964?

CVE-2023-26964 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2023-26964?

Patch guidance is available from hyper security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-26964.

Which products are affected by CVE-2023-26964?

2 products: hyper h2, hyper hyper.

Fix CVE-2023-26964 - HIGH hyper h2

Description

An issue was discovered in hyper v0.13.7. h2-0.2.4 Stream stacking occurs when the H2 component processes HTTP2 RST_STREAM frames. As a result, the memory and CPU usage are high which can lead to a Denial of Service (DoS).

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-770 CWE-770

Metadata

Primary Vendor: HYPER
Published: 4/11/2023
Last Modified: 2/11/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

hyper : h2hyper : hyper

Remediation Guidance

Executive Summary

Cite this page

CVE-2023-26964. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2023-26964

View on NIST NVD

CVE-2023-26964 vulnerability