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Ubuntu 22.04 LTS: USN-7892-1 H2O Critical Denial of Service CVE-2023-44487

ubuntu
Calendar Grey November 26, 2025
Dist Ubuntu Esm H88
H2O crash issue in Ubuntu releases identified, requiring immediate patches for critical denial of service vulnerabilities.
H2O could be made to crash if it received specially crafted network traffic.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: H2O could be made to crash if it received specially crafted network traffic. Software Description: - h2o: the optimized HTTP/1, HTTP/2 server Details: It was discovered that H2O exhibited poor server resource management in its HTTP/2 protocol. An attacker could possibly use this issue to cause H2O to crash, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu h2o CVE-2023-44487

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS h2o 2.2.5+dfsg2-6.1ubuntu2+esm1 Available with Ubuntu Pro libh2o0.13 2.2.5+dfsg2-6.1ubuntu2+esm1 Available with Ubuntu Pro Ubuntu 20.04 LTS h2o 2.2.5+dfsg2-3ubuntu0.1~esm1 Available with Ubuntu Pro libh2o0.13 2.2.5+dfsg2-3ubuntu0.1~esm1 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7892-1

CVE-2023-44487

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7892-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu h2o CVE-2023-44487

Package Information

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