Read the docs
TI-2026-04312 Aliases CVE-2026-4948GHSA-mxjh-5564-f256

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

Priority LOW 24CWE-279Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 8 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00126 2nd percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 8 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 10—2.4.2-1.el10_2Patch availableCNA
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support—2.3.1-1.el10_0.1Patch availableCNA
Red HatRed Hat Enterprise Linux 9—1.3.4-20.el9_8Patch availableCNA
Red HatRed Hat Enterprise Linux 9—1.3.4-20.el9_8Patch availableCNA
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support—1.3.4-15.el9_6.1Patch availableCNA
Red HatRed Hat Enterprise Linux 7——No fix listedCNA
Red HatRed Hat Enterprise Linux 8——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——No fix listedCNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 2.4.2-1.el10_2 Patch available CNA
  • Red Hat Enterprise Linux 10.0 Extended Update Support VendorRed Hat Affected — Fixed in 2.3.1-1.el10_0.1 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.3.4-20.el9_8 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.3.4-20.el9_8 Patch available CNA
  • Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 1.3.4-15.el9_6.1 Patch available CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:firewalld:firewalld:*:*:*:*:*:*:*:*up to 2.4.0VulnerableFirewalld
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:firewalld:firewalld:*:*:*:*:*:*:*:* Versions up to 2.4.0 Vulnerable ·Firewalld
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 3 advisories

  • RHSA-2026:76844 Released 2026-10-06 · Red Hat rating Moderate
    firewalld security update
    • 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
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) firewalld-1.3.4-15.el9_6.1, firewalld-filesystem-1.3.4-15.el9_6.1, python3-firewall-1.3.4-15.el9_6.1
  • RHSA-2026:67843 Released 2026-09-16 · Red Hat rating Moderate
    firewalld security update
    • 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
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) firewalld-2.3.1-1.el10_0.1, firewalld-filesystem-2.3.1-1.el10_0.1, python3-firewall-2.3.1-1.el10_0.1
  • RHSA-2026:67585 Released 2026-09-15 · Red Hat rating Moderate
    firewalld security update
    • Red Hat Enterprise Linux AppStream (v. 9) firewall-applet-1.3.4-20.el9_8, firewall-config-1.3.4-20.el9_8
    • Red Hat Enterprise Linux BaseOS (v. 9) firewalld-1.3.4-20.el9_8, firewalld-filesystem-1.3.4-20.el9_8, python3-firewall-1.3.4-20.el9_8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed—
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:67585
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:67843
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:76844
Red Hat Enterprise Linux BaseOS (v. 10)Fixed—
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:67585
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:67843
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:76844

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4948
  2. 2026-10-03 Alias added: GHSA-mxjh-5564-f256
  3. 2026-10-06 Fix available: firewalld@0:1.3.4-15.el9_6.1 · CNA
  4. 2026-10-06 1 new reference · CNA
  5. 2026-10-07 Fix available: RHSA-2026:76844 · Red Hat
  6. 2026-10-07 Fix available: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6) · Red Hat

References

Advisory 6

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences