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Fencer Vulns
medium 6.2

CVE-2026-89329 json

Device-mapper-multipath: local denial of service via blocking ipc send operations

published 2026-09-11 58 d ago modified 2026-11-06 3 d ago also EUVD-2026-76186

cvss
6.2
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 5%
public exploits
0
none known

Summary

A flaw was found in `multipathd`. A local attacker with access to the `multipathd` UNIX control socket can exploit this vulnerability by sending valid commands and then ceasing to read replies. This action can cause the `multipathd` listener thread to block, leading to a Denial of Service (DoS) where legitimate Inter-Process Communication (IPC) operations may hang or time out. This issue does not result in privilege escalation, arbitrary code execution, or impact data confidentiality or integrity.

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-2026-89329 updated cvss 6.2

device-mapper-multipath: Local Denial of Service via Blocking IPC Send Operations

  • Red Hat Enterprise Linux 6 kpartx, device-mapper-multipath-libs, device-mapper-multipath 0.9.9-19.el10
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 kpartx, libdmmp, device-mapper-multipath, device-mapper-multipath-libs, device-mapper-multipath-sysvinit, device-mapper-multipath 0.9.9-19.el10 Red Hat Enterprise Linux 8 kpartx, libdmmp, device-mapper-multipath, device-mapper-multipath-libs, device-mapper-multipath 0.9.9-19.el10 Red Hat Enterprise Linux 9 kpartx, device-mapper-multipath, device-mapper-multipath-libs, device-mapper-multipath 0.9.9-19.el10 Red Hat Enterprise Linux 10 device-mapper-multipath 0.9.9-19.el10 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”

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
58 d ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • 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-1322 Use of Blocking Code in Single-threaded, Non-blocking Context

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.