# CVE-2026-4948: Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization > Local unprivileged users can modify firewall settings via D-Bus due to missing authorization checks, allowing unauthorized network configuration changes. - **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 27 Mar 2026 - **Updated:** 6 Oct 2026 - **Also known as:** ALSA-2026:67585, AZL-85335, CLSA-2026-1778887961, CLSA-2026-1779124021, DEBIAN-CVE-2026-4948, GHSA-mxjh-5564-f256, OESA-2026-1855, OESA-2026-1856, OESA-2026-1857, OESA-2026-1858, OESA-2026-1859, RHBA-2026:28238, RHSA-2026:67585, RHSA-2026:67843, RHSA-2026:76844, RLSA-2026:67585, SUSE-SU-2026:1872-1, SUSE-SU-2026:21418-1, SUSE-SU-2026:22060-1, SUSE-SU-2026:22263-1, SUSE-SU-2026:22343-1, SUSE-SU-2026:2302-1, SUSE-SU-2026:2745-1, UBUNTU-CVE-2026-4948, openSUSE-SU-2026:11289-1, openSUSE-SU-2026:21032-1 ## What is CVE-2026-4948? CVE-2026-4948 is a medium-severity missing authorization vulnerability in Redhat Enterprise Linux, published on 27 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim. ### 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. Weakness: CWE-279 (Incorrect Execution-Assigned Permissions) ## Which versions are affected by CVE-2026-4948? It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `firewall-applet` | AlmaLinux:9 | All versions | 1.3.4-20.el9_8 | | `firewall-config` | AlmaLinux:9 | All versions | 1.3.4-20.el9_8 | | `firewalld` | AlmaLinux:9 | All versions | 1.3.4-20.el9_8 | | `firewalld-filesystem` | AlmaLinux:9 | All versions | 1.3.4-20.el9_8 | | `python3-firewall` | AlmaLinux:9 | All versions | 1.3.4-20.el9_8 | | `firewall-applet` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.4.2-1.el10_2 | | `firewall-config` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.4.2-1.el10_2 | | `firewalld` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.4.2-1.el10_2 | | `firewalld-filesystem` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.4.2-1.el10_2 | | `python3-firewall` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.4.2-1.el10_2 | | `firewall-applet` | Red Hat:enterprise_linux:9::appstream | All versions | 0:1.3.4-20.el9_8 | | `firewall-config` | Red Hat:enterprise_linux:9::appstream | All versions | 0:1.3.4-20.el9_8 | | `firewalld` | Red Hat:enterprise_linux:9::baseos | All versions | 0:1.3.4-20.el9_8 | | `firewalld-filesystem` | Red Hat:enterprise_linux:9::baseos | All versions | 0:1.3.4-20.el9_8 | | `python3-firewall` | Red Hat:enterprise_linux:9::baseos | All versions | 0:1.3.4-20.el9_8 | | `firewall-applet` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.3.1-1.el10_0.1 | | `firewall-config` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.3.1-1.el10_0.1 | | `firewalld` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.3.1-1.el10_0.1 | | `firewalld-filesystem` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.3.1-1.el10_0.1 | | `python3-firewall` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.3.1-1.el10_0.1 | | `firewall-applet` | Red Hat:rhel_eus:9.6::appstream | All versions | 0:1.3.4-15.el9_6.1 | | `firewall-config` | Red Hat:rhel_eus:9.6::appstream | All versions | 0:1.3.4-15.el9_6.1 | | `firewalld` | Red Hat:rhel_eus:9.6::baseos | All versions | 0:1.3.4-15.el9_6.1 | | `firewalld-filesystem` | Red Hat:rhel_eus:9.6::baseos | All versions | 0:1.3.4-15.el9_6.1 | | `python3-firewall` | Red Hat:rhel_eus:9.6::baseos | All versions | 0:1.3.4-15.el9_6.1 | | `firewalld` | Rocky Linux:9 | All versions | 0:1.3.4-20.el9_8 | | `firewalld` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 1.3.4-150600.13.6.1 | | `firewalld` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | All versions | 1.3.4-150600.13.6.1 | | `firewalld` | SUSE:Linux Enterprise Module for Development Tools 15 SP7 | All versions | 1.3.4-150600.13.6.1 | | `firewalld` | SUSE:Linux Enterprise Module for Python 3 15 SP7 | All versions | 1.3.4-150600.13.6.1 | | `firewalld` | SUSE:Linux Enterprise Server 16.0 | All versions | 2.1.2-160000.3.1 | | `firewalld` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 2.1.2-160000.3.1 | | `rpcbind` | SUSE:Linux Micro 6.0 | All versions | 1.2.9-1.1 | | `firewalld` | SUSE:Linux Micro 6.1 | All versions | 2.0.0-slfo.1.1_2.1 | | `firewalld` | SUSE:Linux Micro 6.2 | All versions | 2.1.2-160000.3.1 | | `firewalld` | openSUSE:Leap 16.0 | All versions | 2.1.2-160000.3.1 | | `firewalld` | openSUSE:Tumbleweed | All versions | 2.3.2-2.1 | Products: Firewalld Firewalld, Redhat Enterprise Linux. ## How do I fix CVE-2026-4948? Apply the vendor's patch. ## Is CVE-2026-4948 being exploited? There is no known exploitation of CVE-2026-4948 in the wild and no public exploit code. ## Other vulnerabilities in Redhat Enterprise Linux - [CVE-2016-5410](https://insights.sbomify.com/CVE-2016-5410/): Auth bypass in n/a (medium 5.5) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-4948 and fix it if it is affected. What it is: CVE-2026-4948 is a medium-severity missing authorization vulnerability in Redhat Enterprise Linux, published on 27 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2026-4948 in the wild and no public exploit code. Affected product: Redhat Enterprise Linux. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-4948/ (Markdown: https://insights.sbomify.com/CVE-2026-4948/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4948 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4948 - OSV: https://osv.dev/vulnerability/CVE-2026-4948 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-4948/ Summaries are generated and may contain mistakes; the official description above is the record.