CVE-2026-111253
Dnf5daemon-server: dnf5: dnf5daemon-server: missing session-owner check allows foreign d-bus callers to replace another client's resolved transaction
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.
Fixes and workarounds
Workaround
Until a fixed build is available, avoid leaving interactive dnf5daemon sessions open on multi-user systems where untrusted local accounts can access the system bus, and close sessions promptly after use.
Source: CNA: fedoraAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Red Hat Hardened Images Red Hat dnf5
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: fedora |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.6 medium |
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H | CNA: fedora |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/security/cve/CVE-2026-111253CNA: fedora · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2553683CNA: fedora · issue-tracking, x_refsource_REDHAT
- https://github.com/rpm-software-management/dnf5/commit/46a4a8ad8d34af91ec2add6bb29e487571ea6c85CNA: fedora
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