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[USN-8249-1] dpkg vulnerability

Posted on 07 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8249-1
May 07, 2026

dpkg vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS

Summary:

dpkg could be made to stop responding if it opened a specially crafted
file.

Software Description:
- dpkg: Debian package management system

Details:

Yashashree Gund discovered that the dpkg dpkg-deb tool incorrectly handled
certain zstd-compressed .deb archives. If a user or automated system were
tricked into manipulating a specially crafted .deb archive, a remote
attacker could possibly use this issue to cause dpkg-deb to stop
responding, resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
dpkg 1.22.21ubuntu3.2

Ubuntu 24.04 LTS
dpkg 1.22.6ubuntu6.6

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8249-1
CVE-2026-2219

Package Information:
https://launchpad.net/ubuntu/+source/dpkg/1.22.21ubuntu3.2
https://launchpad.net/ubuntu/+source/dpkg/1.22.6ubuntu6.6

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