Nixpkgs Security Tracker

Untriaged

Permalink CVE-2026-4897

5.5 MEDIUM

CVSS version: 3.1
Attack vector (AV): LOCAL
Attack complexity (AC): LOW
Privileges required (PR): LOW
User interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality impact (C): NONE
Integrity impact (I): NONE
Availability impact (A): HIGH

created 2 days, 13 hours ago

Polkit: polkit: denial of service via unbounded input processing through standard input

A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

References

https://access.redhat.com/security/cve/CVE-2026-4897 x_refsource_REDHAT vdb-entry
RHBZ#2451739 issue-tracking x_refsource_REDHAT

Affected products

rhcos

polkit

Matching in nixpkgs

pkgs.polkit

Toolkit for defining and handling the policy that allows unprivileged processes to speak to privileged processes

nixos-unstable 127
- nixpkgs-unstable 127
- nixos-unstable-small 127
nixos-25.11 126
- nixos-25.11-small 126
- nixpkgs-25.11-darwin 126

pkgs.cmd-polkit

Easily create polkit authentication agents by using commands

nixos-unstable 0.3.0
- nixpkgs-unstable 0.3.0
- nixos-unstable-small 0.3.0
nixos-25.11 0.3.0
- nixos-25.11-small 0.3.0
- nixpkgs-25.11-darwin 0.3.0

pkgs.mate-polkit

Integrates polkit authentication for MATE desktop

nixos-unstable 1.28.1
- nixpkgs-unstable 1.28.1
- nixos-unstable-small 1.28.1

pkgs.polkit_gnome

Dbus session bus service that is used to bring up authentication dialogs

nixos-unstable 0.105
- nixpkgs-unstable 0.105
- nixos-unstable-small 0.105
nixos-25.11 0.105
- nixos-25.11-small 0.105
- nixpkgs-25.11-darwin 0.105

pkgs.hyprpolkitagent

Polkit authentication agent written in QT/QML

nixos-unstable 0.1.3
- nixpkgs-unstable 0.1.3
- nixos-unstable-small 0.1.3
nixos-25.11 0.1.3
- nixos-25.11-small 0.1.3
- nixpkgs-25.11-darwin 0.1.3

pkgs.mate.mate-polkit

Integrates polkit authentication for MATE desktop

nixos-unstable 1.28.1
- nixpkgs-unstable 1.28.1
- nixos-unstable-small 1.28.1
nixos-25.11 1.28.1
- nixos-25.11-small 1.28.1
- nixpkgs-25.11-darwin 1.28.1

pkgs.pcscliteWithPolkit

Middleware to access a smart card using SCard API (PC/SC)

nixos-unstable 2.4.1
- nixpkgs-unstable 2.4.1
- nixos-unstable-small 2.4.1
nixos-25.11 2.3.0
- nixos-25.11-small 2.3.0
- nixpkgs-25.11-darwin 2.3.0

pkgs.libsForQt5.polkit-qt

Qt wrapper around PolKit

nixos-unstable 1-0.114.0
- nixpkgs-unstable 1-0.114.0
- nixos-unstable-small 1-0.114.0
nixos-25.11 1-0.114.0
- nixos-25.11-small 1-0.114.0
- nixpkgs-25.11-darwin 1-0.114.0

pkgs.deepin.dde-polkit-agent

PolicyKit agent for Deepin Desktop Environment

pkgs.kdePackages.polkit-qt-1

Qt wrapper around Polkit-1 client libraries

nixos-unstable 1-0.200.0
- nixpkgs-unstable 1-0.200.0
- nixos-unstable-small 1-0.200.0
nixos-25.11 1-0.200.0
- nixos-25.11-small 1-0.200.0
- nixpkgs-25.11-darwin 1-0.200.0

pkgs.plasma5Packages.polkit-qt

Qt wrapper around PolKit

nixos-unstable 1-0.114.0
- nixpkgs-unstable 1-0.114.0
- nixos-unstable-small 1-0.114.0
nixos-25.11 1-0.114.0
- nixos-25.11-small 1-0.114.0
- nixpkgs-25.11-darwin 1-0.114.0

pkgs.lomiri.lomiri-polkit-agent

Policy kit agent for the Lomiri desktop

nixos-unstable 0.3.2
- nixpkgs-unstable 0.3.2
- nixos-unstable-small 0.3.2
nixos-25.11 0.3.2
- nixos-25.11-small 0.3.2
- nixpkgs-25.11-darwin 0.3.2

pkgs.libsForQt5.polkit-kde-agent

None

pkgs.kdePackages.polkit-kde-agent-1

Daemon providing a Polkit authentication UI for Plasma

nixos-unstable 1-6.6.3
- nixpkgs-unstable 1-6.6.3
- nixos-unstable-small 1-6.6.3
nixos-25.11 1-6.5.5
- nixos-25.11-small 1-6.5.5
- nixpkgs-25.11-darwin 1-6.5.5

pkgs.pantheon.pantheon-agent-polkit

Polkit Agent for the Pantheon Desktop

nixos-unstable 8.0.2
- nixpkgs-unstable 8.0.2
- nixos-unstable-small 8.0.2
nixos-25.11 8.0.1
- nixos-25.11-small 8.0.1
- nixpkgs-25.11-darwin 8.0.1

pkgs.plasma5Packages.polkit-kde-agent