CVE-2026-2219 Denial of service in dpkg
Attackers can cause a denial of service via infinite loop in dpkg-deb when processing malicious zstd-compressed archives.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-2219?
CVE-2026-2219 is a high-severity denial of service vulnerability in Debian dpkg, published on 7 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
It was discovered that dpkg-deb (a component of dpkg, the Debian package management system) does not properly validate the end of the data stream when uncompressing a zstd-compressed .deb archive, which may result in denial of service (infinite loop spinning the CPU).
Weakness: CWE-835
Which versions are affected by CVE-2026-2219?
It affects 1 product.
Linux distribution packages (10)
dpkg SUSE:Linux Enterprise Server 16.0 | All versions | 1.22.21-160000.3.1 |
update-alternatives SUSE:Linux Enterprise Server 16.0 | All versions | 1.22.21-160000.3.1 |
dpkg SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 1.22.21-160000.3.1 |
update-alternatives SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 1.22.21-160000.3.1 |
update-alternatives SUSE:Linux Micro 6.0 | All versions | 1.22.0-3.1 |
update-alternatives SUSE:Linux Micro 6.1 | All versions | 1.22.0-slfo.1.1_3.1 |
update-alternatives SUSE:Linux Micro 6.2 | All versions | 1.22.21-160000.3.1 |
dpkg openSUSE:Leap 16.0 | All versions | 1.22.21-160000.3.1 |
update-alternatives openSUSE:Leap 16.0 | All versions | 1.22.21-160000.3.1 |
dpkg openSUSE:Tumbleweed | All versions | 1.22.22-1.1 |
Products include Debian Dpkg.
How do I fix CVE-2026-2219?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-2219 being exploited?
There is no known exploitation of CVE-2026-2219 in the wild and no public exploit code.
Other vulnerabilities in Debian dpkg
Sources
Also known as AZL-79509, DEBIAN-CVE-2026-2219, ECHO-d2d4-4737-f820, GHSA-x8w5-j8fh-hpvp, MGASA-2026-0144, SUSE-SU-2026:20766-1 and 7 more.