USN-8233-2: nghttp2 vulnerability
Publication date
6 May 2026
Overview
nghttp2 could be made to crash if it received specially crafted network traffic.
Releases
Packages
- 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.
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
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | libnghttp2-14 – 1.68.0-2ubuntu0.1 | ||
| nghttp2 – 1.68.0-2ubuntu0.1 | |||
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