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Ubuntu 25.10 dpkg Important Denial of Service Risk USN-8249-1

ubuntu
Calendar Grey May 7, 2026
Dist Ubuntu Esm H88
dpkg exposes Ubuntu to DoS risks through specially crafted files. Update to mitigate this issue.
dpkg could be made to stop responding if it opened a specially crafted file.

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.

Topics%20covered

Topics Covered

security advisory denial of service update Ubuntu important dpkg

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

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8249-1

Topics%20covered

Topics Covered

security advisory denial of service update Ubuntu important dpkg

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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