USN-8520-1: Expat vulnerability
Publication date
9 July 2026
Overview
Expat could be made to crash if it received specially crafted input.
Releases
Packages
- expat - XML parsing C library
Details
It was discovered that Expat used insufficient entropy when generating
hash salt values for its internal hash table. An attacker could use this
to craft an XML document that triggers hash flooding, leading to a
denial of service.
It was discovered that Expat used insufficient entropy when generating
hash salt values for its internal hash table. An attacker could use this
to craft an XML document that triggers hash flooding, leading to 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 | ||
|---|---|---|---|
| 16.04 LTS xenial | libexpat1 – 2.1.0-7ubuntu0.16.04.5+esm12 | ||
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