PT-2026-28678 · Firewalld · Firewall

Osidb Bzimport · Published 2026-03-27 · Updated 2026-05-15 · CVE-2026-4948

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions firewalld (affected versions not specified)

Description A flaw exists in firewalld that allows a local unprivileged user to modify the runtime firewall state without proper authentication. This is possible due to mis-authorization of two runtime D-Bus setters: setZoneSettings2 and setPolicySettings. Exploitation of this issue leads to unauthorized changes in network security configurations. D-Bus (Desktop Bus) is a message bus system that allows communication between applications on a Linux system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-279

Related Identifiers

CVE-2026-4948

OESA-2026-1855

OESA-2026-1856

OESA-2026-1857

OESA-2026-1858

OESA-2026-1859

Affected Products

Firewall

References · 22

• https://ubuntu.com/security/CVE-2026-4948 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1858 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4948 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4948 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1855 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4948 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2452086 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4948 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1859 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-4948 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1856 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1857 · Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-4948 · Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2026/05/msg00029.html · Note
• https://t.me/cveNotify/161603 · Telegram Post