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Fencer Intel
medium 6.2

CVE-2026-89329 json

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

published 2mo ago modified 6d 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.

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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
2mo ago

Exploit prediction

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

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 Intel 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.