CVE-2026-19617 Libdm: lvm2: libdm: denial of service via uncontrolled recursion in config parser
A local attacker can cause a denial of service by crafting malicious LVM metadata that triggers uncontrolled recursion in the libdm parser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-19617?
CVE-2026-19617 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 14 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A flaw was found in libdm. A local attacker could craft a malicious Logical Volume Manager (LVM) metadata configuration with deeply nested structures. This could lead to uncontrolled recursion in the libdm configuration file parser, exhausting the stack and causing any LVM command reading the metadata to crash. This vulnerability results in a Denial of Service (DoS) for affected systems.
Weakness: CWE-770
Which versions are affected by CVE-2026-19617?
It affects 3 products.
Linux distribution packages (6)
lvm2 Red Hat:hummingbird:1 | All versions | 0:2.03.43-1.hum1 |
lvm2-dbusd Red Hat:hummingbird:1 | All versions | 0:2.03.43-1.hum1 |
lvm2-devel Red Hat:hummingbird:1 | All versions | 0:2.03.43-1.hum1 |
lvm2-libs Red Hat:hummingbird:1 | All versions | 0:2.03.43-1.hum1 |
lvm2-lockd Red Hat:hummingbird:1 | All versions | 0:2.03.43-1.hum1 |
lvm2-testsuite Red Hat:hummingbird:1 | All versions | 0:2.03.43-1.hum1 |
Products include Redhat Enterprise Linux, Redhat Hardened Images, Redhat Openshift Container Platform.
How do I fix CVE-2026-19617?
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-2026-19617 being exploited?
There is no known exploitation of CVE-2026-19617 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
- CVE-2018-14667 Red Hat JBoss RichFaces Framework Expression Language Injection
- CVE-2021-20325 Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit
- CVE-2018-25011 Memory corruption in libwebp
- CVE-2018-25014 Other in libwebp
- CVE-2014-3585 Supply chain in redhat-upgrade-tool
Sources
Also known as AZL-96698, DEBIAN-CVE-2026-19617, ECHO-48b4-f133-d141, GHSA-2f2v-c79p-8x4x, RHSA-2026:73989, UBUNTU-CVE-2026-19617.