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Vulnerability · Published Mar 27, 2026 · Assigned by redhat

CVE-2026-4948Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization

Medium 5.5

In plain English

A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 97.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9firewall-applet1.3.4-20.el9_8ALSA-2026:67585
AlmaLinux:9firewall-config1.3.4-20.el9_8ALSA-2026:67585
AlmaLinux:9firewalld1.3.4-20.el9_8ALSA-2026:67585
AlmaLinux:9firewalld-filesystem1.3.4-20.el9_8ALSA-2026:67585
AlmaLinux:9python3-firewall1.3.4-20.el9_8ALSA-2026:67585
Debian:12firewalld1.3.3-1~deb12u2DEBIAN-CVE-2026-4948
Debian:13firewalld2.3.1-1+deb13u1DEBIAN-CVE-2026-4948
Debian:14firewalld2.4.0-2DEBIAN-CVE-2026-4948
Rocky Linux:9firewalld0:1.3.4-20.el9_8RLSA-2026:67585
Ubuntu:22.04:LTSfirewalldno fix listedUBUNTU-CVE-2026-4948
Ubuntu:24.04:LTSfirewalldno fix listedUBUNTU-CVE-2026-4948
Ubuntu:25.10firewalldno fix listedUBUNTU-CVE-2026-4948
Ubuntu:26.04:LTSfirewalldno fix listedUBUNTU-CVE-2026-4948
Ubuntu:26.10firewalldno fix listedUBUNTU-CVE-2026-4948

Affected products (as reported)

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

Weakness: CWE-279 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References