What is the severity of USN-7424-1?

The vulnerability USN-7424-1 has a high severity as it can lead to a denial of service through stack overflow.

How do I fix USN-7424-1?

To fix USN-7424-1, update the expat and libexpat1 packages to their respective patched versions for your Ubuntu release.

Who is affected by USN-7424-1?

USN-7424-1 affects users of Ubuntu 22.04, 24.04, and 24.10 with specific versions of the expat and libexpat1 packages.

What causes the vulnerability USN-7424-1?

The vulnerability USN-7424-1 is caused by a stack overflow that occurs when processing deeply nested entity references in XML documents.

Can USN-7424-1 be exploited remotely?

Yes, USN-7424-1 can be exploited remotely if a user or automated system is tricked into processing specially crafted XML input.

Vulnerability/
USN-7424-1

8/4/2025

USN-7424-1: Expat vulnerability

First published: Tue Apr 08 2025(Updated: )

It was discovered that Expat could crash due to stack overflow when processing XML documents with deeply nested entity references. If a user or automated system were tricked into processing specially crafted XML input, an attacker could use this issue to cause a denial of service.

Affected Software	Affected Version	How to fix
All of
ubuntu/expat	<2.6.2-2ubuntu0.2	2.6.2-2ubuntu0.2
Ubuntu	=24.10
All of
ubuntu/libexpat1	<2.6.2-2ubuntu0.2	2.6.2-2ubuntu0.2
Ubuntu	=24.10
All of
ubuntu/expat	<2.6.1-2ubuntu0.3	2.6.1-2ubuntu0.3
Ubuntu	=24.04
All of
ubuntu/libexpat1	<2.6.1-2ubuntu0.3	2.6.1-2ubuntu0.3
Ubuntu	=24.04
All of
ubuntu/expat	<2.4.7-1ubuntu0.6	2.4.7-1ubuntu0.6
Ubuntu	=22.04
All of
ubuntu/libexpat1	<2.4.7-1ubuntu0.6	2.4.7-1ubuntu0.6
Ubuntu	=22.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

CVE-2024-8176

Frequently Asked Questions

What is the severity of USN-7424-1?
The vulnerability USN-7424-1 has a high severity as it can lead to a denial of service through stack overflow.
How do I fix USN-7424-1?
To fix USN-7424-1, update the expat and libexpat1 packages to their respective patched versions for your Ubuntu release.
Who is affected by USN-7424-1?
USN-7424-1 affects users of Ubuntu 22.04, 24.04, and 24.10 with specific versions of the expat and libexpat1 packages.
What causes the vulnerability USN-7424-1?
The vulnerability USN-7424-1 is caused by a stack overflow that occurs when processing deeply nested entity references in XML documents.
Can USN-7424-1 be exploited remotely?
Yes, USN-7424-1 can be exploited remotely if a user or automated system is tricked into processing specially crafted XML input.

agent/last-modified-date
agent/source
agent/references
agent/title
agent/softwarecombine
agent/tags
agent/type
agent/description
agent/first-publish-date
agent/event
collector/usn
source/Ubuntu
agent/software-canonical-lookup
package-manager/ubuntu
vendor/ubuntu
canonical/ubuntu
version/ubuntu/24.10
version/ubuntu/24.04
version/ubuntu/22.04

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