What is CVE-2023-26964?

CVE-2023-26964 is a high-severity vulnerability in Hyper H2, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2023-04-11.

How severe is CVE-2023-26964?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Hyper H2

CVE-2023-26964

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).

EPSS: 0.011 (62.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Hyper H2 — versions 0.2.4
Hyper — versions 0.13.7
N/a — versions n/a

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (vendor-advisory)
cve@mitre.org (vendor-advisory)

Frequently asked questions

What is CVE-2023-26964?: CVE-2023-26964 is a high-severity vulnerability in Hyper H2, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2023-04-11.
How severe is CVE-2023-26964?: High severity. CVSS v3 base score is 7.5 out of 10.