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Fencer Vulns
medium 5.5

CVE-2026-19617 json

Libdm: lvm2: libdm: denial of service via uncontrolled recursion in config parser

published 2026-08-14 2 mo ago modified 2026-11-05 3 d ago also EUVD-2026-58594

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Hardened Images 2.03.43-1.hum1
  • lvm2 hummingbird 1 2.03.43-1.hum1
  • lvm2-libs hummingbird 1 2.03.43-1.hum1
  • lvm2-dbusd hummingbird 1 2.03.43-1.hum1
  • lvm2-lockd hummingbird 1 2.03.43-1.hum1
  • lvm2-testsuite hummingbird 1 2.03.43-1.hum1

red hat advisories RHSA-2026:73989

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-19617 updated cvss 5.5

libdm: lvm2: libdm: Denial of Service via uncontrolled recursion in config parser

  • Red Hat Enterprise Linux 6 lvm2, cmirror, lvm2-libs, lvm2-cluster, device-mapper, device-mapper-libs, +2 more Red Hat Enterprise Linux 7 lvm2, cmirror, lvm2-libs, lvm2-lockd, lvm2-cluster, device-mapper, +6 more Red Hat Enterprise Linux 8 lvm2, cmirror, lvm2-libs, lvm2-dbusd, lvm2-lockd, device-mapper, +3 more Red Hat Enterprise Linux 9 lvm2, lvm2-libs, lvm2-dbusd, lvm2-lockd, device-mapper, device-mapper-libs, +2 more Red Hat Enterprise Linux 10 lvm2 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    +1 more products
    Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images lvm2 2.03.43-1.hum1, lvm2-libs 2.03.43-1.hum1, lvm2-dbusd 2.03.43-1.hum1, lvm2-lockd 2.03.43-1.hum1, lvm2-testsuite 2.03.43-1.hum1
    fixed: vendor fix RHSA-2026:73989
  • Red Hat Hardened Images device-mapper 1.02.217-1.hum1, device-mapper-libs 1.02.217-1.hum1, device-mapper-event 1.02.217-1.hum1, device-mapper-event-libs 1.02.217-1.hum1
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.