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Fencer Vulns
high 7.1

CVE-2026-19816 json

PackageKit: dnf5 backend ignores SIMULATE on RepoRemove

published 2026-09-14 55 d ago modified 2026-09-18 51 d ago also EUVD-2026-78063

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

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.

Patch / fix

  • Fedora Fedora 1.4.0
  • packagekit Debian 14 1.4.0-1

debian advisories DEBIAN-CVE-2026-19816

  • PackageKit openSUSE Tumbleweed 1.4.0-1.1

opensuse advisories openSUSE-SU-2026:11855-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-19816 updated cvss 7.1

packagekit: PackageKit: PackageKit dnf5 ignores SIMULATE on RepoRemove

  • Red Hat Enterprise Linux 6 PackageKit-qt, PackageKit-yum, PackageKit-cron, PackageKit-glib, PackageKit-gtk-module, PackageKit-yum-plugin, +6 more Red Hat Enterprise Linux 7 PackageKit, PackageKit-yum, PackageKit-cron, PackageKit-glib, PackageKit-yum-plugin, PackageKit-gtk3-module, +4 more Red Hat Enterprise Linux 8 PackageKit, PackageKit-cron, PackageKit-glib, PackageKit-gtk3-module, PackageKit 1.2.8-8.el10_2, PackageKit-gstreamer-plugin, +1 more Red Hat Enterprise Linux 9 PackageKit, PackageKit-glib, PackageKit-gtk3-module, PackageKit 1.2.8-8.el10_2, PackageKit-gstreamer-plugin, PackageKit-command-not-found Red Hat Enterprise Linux 10 PackageKit 1.2.8-8.el10_2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
54 d ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Affected products

  • Fedora Fedora
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.