========================================================================== Ubuntu Security Notice USN-8233-2 May 06, 2026 nghttp2 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS Summary: nghttp2 could be made to crash if it received specially crafted network traffic. Software Description: - nghttp2: HTTP/2 C Library and tools Details: USN-8233-1 fixed a vulnerability in nghttp2. This update provides the corresponding update for Ubuntu 26.04 LTS. Original advisory details: Andrew MacPherson discovered that nghttp2 did not properly validate internal state when the session termination API was called. A remote attacker could possibly use this issue to cause nghttp2 to crash, resulting in a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS libnghttp2-14 1.68.0-2ubuntu0.1 nghttp2 1.68.0-2ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8233-2 https://ubuntu.com/security/notices/USN-8233-1 CVE-2026-27135 Package Information: https://launchpad.net/ubuntu/+source/nghttp2/1.68.0-2ubuntu0.1
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