CVE-2026-19816

PackageKit: dnf5 backend ignores SIMULATE on RepoRemove

Published: Sep 14, 2026Updated: Sep 18, 2026 Sources: CVE List NVDCWE-863

7.1HIGH

Description

A flaw was found in PackageKit. PackageKit skips the polkit authorization check for transactions carrying the SIMULATE (dry-run) flag. In the dnf5 backend, the RepoRemove handler ignores that contract and always executes the real transaction because its guard is written as (role == REPO_REMOVE || !SIMULATE), which is always true for RepoRemove. An unprivileged local user can therefore perform a genuine package uninstall while claiming to simulate. This vulnerability only affects systems using PackageKit with the dnf5 backend.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:LAttack Vector

Local

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-863

Affected Products

Fedora

oss-projectaka fedora linux

FedoraOn-premOS

Operating Systems / linux-distro

Red Hat

commercial·US

Red Hat Enterprise Linux 10On-premOS

Operating Systems / linux-distro

and 5 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://github.com/PackageKit/PackageKit/commit/33be77b3ecd3b566ca117358dc18c58c964e627b

github.com

https://github.com/PackageKit/PackageKit/security/advisories/GHSA-g5gf-h68q-gxc8

github.com

https://bugzilla.redhat.com/show_bug.cgi?id=2515940

bugzilla.redhat.com

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