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Fencer Vulns
medium 5.5

CVE-2026-4948 json

Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization

published 2026-03-27 7 mo ago modified 2026-11-05 3 d ago also EUVD-2026-16557

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:2.4.2-1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:2.3.1-1.el10_0.1
  • Red Hat Red Hat Enterprise Linux 9 0:1.3.4-20.el9_8
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.3.4-15.el9_6.1
  • firewalld Debian 12 1.3.3-1~deb12u2
  • firewalld Debian 13 2.3.1-1+deb13u1
  • firewalld Debian 14 2.4.0-2

debian advisories DEBIAN-CVE-2026-4948

  • firewalld RHEL 9 1.3.4-20.el9_8
  • firewall-applet RHEL 9 1.3.4-20.el9_8
  • firewall-config RHEL 9 1.3.4-20.el9_8
  • python3-firewall RHEL 9 1.3.4-20.el9_8
  • firewalld-filesystem RHEL 9 1.3.4-20.el9_8
  • firewalld RHEL 10.2 2.4.2-1.el10_2
  • firewall-applet RHEL 10.2 2.4.2-1.el10_2
  • firewall-config RHEL 10.2 2.4.2-1.el10_2

red hat advisories RHSA-2026:76844RHSA-2026:67843RHSA-2026:67585RHBA-2026:28238

  • firewalld SLE Module for Python 3 15 SP7, SLE Module for Development Tools 15 SP7, SLE Module for Desktop Applications 15 SP7 +1 more 1.3.4-150600.13.6.1
  • firewalld SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.1.2-160000.3.1
  • firewalld Linux Micro 6.1 2.0.0-slfo.1.1_2.1
  • rpcbind Linux Micro 6.0 1.2.9-1.1

suse advisories SUSE-SU-2026:2745-1SUSE-SU-2026:22263-1SUSE-SU-2026:22343-1SUSE-SU-2026:22060-1

  • firewalld openSUSE Tumbleweed 2.3.2-2.1
  • firewalld openSUSE Leap 16.0 2.1.2-160000.3.1

opensuse advisories openSUSE-SU-2026:11289-1openSUSE-SU-2026:21032-1

  • firewalld AlmaLinux 9 1.3.4-20.el9_8
  • firewall-applet AlmaLinux 9 1.3.4-20.el9_8
  • firewall-config AlmaLinux 9 1.3.4-20.el9_8
  • python3-firewall AlmaLinux 9 1.3.4-20.el9_8
  • firewalld-filesystem AlmaLinux 9 1.3.4-20.el9_8

almalinux advisories ALSA-2026:67585

  • firewalld Rocky Linux 9 1.3.4-20.el9_8

rocky linux advisories RLSA-2026:67585

  • firewalld Azure Linux 3.0 2.0.2-4

azure linux advisories AZL-85335

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2026-4948 updated cvss 5.5

firewalld: firewalld: Local unprivileged user can modify firewall state due to D-Bus setter mis-authorization

  • Red Hat Enterprise Linux 7 firewalld, firewall-applet, firewall-config, python-firewall, firewalld-filesystem Red Hat Enterprise Linux 8 firewalld, firewall-applet, firewall-config, python3-firewall, firewalld-filesystem Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9
    under investigation
  • Red Hat Enterprise Linux AppStream (v. 9) firewall-applet 1.3.4-20.el9_8, firewall-config 1.3.4-20.el9_8
    fixed: vendor fix RHSA-2026:67585
  • Red Hat Enterprise Linux AppStream (v. 10) firewall-applet 2.4.2-1.el10_2, firewall-config 2.4.2-1.el10_2
    fixed: vendor fix RHBA-2026:28238
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) firewall-applet 2.3.1-1.el10_0.1, firewall-config 2.3.1-1.el10_0.1
    fixed: vendor fix RHSA-2026:67843
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) firewall-applet 1.3.4-15.el9_6.1, firewall-config 1.3.4-15.el9_6.1
    fixed: vendor fix RHSA-2026:76844
  • Red Hat Enterprise Linux BaseOS (v. 9) firewalld 1.3.4-20.el9_8, python3-firewall 1.3.4-20.el9_8, firewalld-filesystem 1.3.4-20.el9_8
    fixed: vendor fix RHSA-2026:67585
  • Red Hat Enterprise Linux BaseOS (v. 10) firewalld 2.4.2-1.el10_2, python3-firewall 2.4.2-1.el10_2, firewalld-filesystem 2.4.2-1.el10_2
    fixed: vendor fix RHBA-2026:28238
show 2 more
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) firewalld 2.3.1-1.el10_0.1, python3-firewall 2.3.1-1.el10_0.1, firewalld-filesystem 2.3.1-1.el10_0.1
    fixed: vendor fix RHSA-2026:67843
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) firewalld 1.3.4-15.el9_6.1, python3-firewall 1.3.4-15.el9_6.1, firewalld-filesystem 1.3.4-15.el9_6.1
    fixed: vendor fix RHSA-2026:76844

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
7 mo ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% 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:L/UI:N/S:U/C:N/I:H/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness
  • CWE-279 Incorrect Execution-Assigned Permissions

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.