Vulnerability · Published Nov 5, 2026 · Assigned by fedora
CVE-2026-111253Dnf5daemon-server: dnf5: dnf5daemon-server: missing session-owner check allows foreign d-bus callers to replace another client's resolved transaction
Medium 6.6
In plain English
A medium-severity missing authorization in Red Hat Hardened Images 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 3% of all known vulnerabilities).
Official description
A flaw was found in dnf5daemon-server. Session methods on dynamically exported D-Bus session objects do not verify that the caller is the unique sender that created the session. A local attacker can modify another user's live package-management session and replace its resolved transaction plan. If the legitimate session party later authorizes execution, the root daemon may apply the attacker-chosen package operations.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | dnf5 | no fix listed | DEBIAN-CVE-2026-111253 |
| Ubuntu:22.04:LTS | dnf | no fix listed | UBUNTU-CVE-2026-111253 |
| Ubuntu:24.04:LTS | dnf | no fix listed | UBUNTU-CVE-2026-111253 |
| Ubuntu:26.04:LTS | dnf | no fix listed | UBUNTU-CVE-2026-111253 |
| Ubuntu:26.10 | dnf | no fix listed | UBUNTU-CVE-2026-111253 |
| Ubuntu:26.04:LTS | dnf5 | no fix listed | UBUNTU-CVE-2026-111253 |
| Ubuntu:26.10 | dnf5 | no fix listed | UBUNTU-CVE-2026-111253 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Hardened Images | see references |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-111253 vdb-entry, x_refsource_REDHAT
- RHBZ#2553683 issue-tracking, x_refsource_REDHAT
- https://github.com/rpm-software-management/dnf5/commit/46a4a8ad8d34af91ec2add6bb29e487571ea6c85