CVE-2023-26964
CVSS v3
7.5
HIGH
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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).
Technical details
- Published
- 2023-04-11
Frequently asked questions
What is 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).
Is CVE-2023-26964 actively exploited?
Active exploitation of CVE-2023-26964 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-26964?
CVE-2023-26964 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2023-26964 affecting your environment?
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