HIGHCVSS 7.8Actively exploited · CISA KEV since 2022-06-27Vulnerability

CVE-2021-4034

The Red Hat polkit pkexec utility contains an out-of-bounds read and write vulnerability that allows for privilege escalation with administrative rights.

Properties

Euvd product
Polkit
Vulnerability name
Red Hat Polkit Out-of-Bounds Read and Write Vulnerability
First seen
2026-08-15T03:55:29+00:00
Cvss score
7.8
Epss score
0.94921
Last seen
2026-10-19T12:00:27+00:00
Due date
2022-07-18
Euvd assigner
redhat
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2022-06-27T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2022-06-27
Euvd base score version
3.1
Score
7.8
Fetched at
2026-10-20T10:36:20+00:00
Cvss vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Related Entities (70 · showing 35)

AFFECTS_PRODUCT (55 · showing 20)

→[Product]cpe:2.3:a:polkit_project:polkit:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:a:suse:linux_enterprise_high_performance_computing:15.0:sp2:*:*:-:*:*:*
→[Product]cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
→[Product]cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
→[Product]cpe:2.3:a:starwindsoftware:command_center:1.0:update3_build5871:*:*:*:*:*:*
→[Product]cpe:2.3:h:siemens:scalance_lpe9403:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:siemens:scalance_lpe9403_firmware:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
→[Product]cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:suse:linux_enterprise_workstation_extension:12:sp5:*:*:*:*:*:*
→[Product]cpe:2.3:a:suse:manager_server:4.1:*:*:*:*:*:*:*
→[Product]cpe:2.3:a:siemens:sinumerik_edge:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:suse:linux_enterprise_desktop:15:sp2:*:*:*:*:*:*
→[Product]cpe:2.3:o:suse:linux_enterprise_server:15:sp2:*:*:*:-:*:*
→[Product]cpe:2.3:a:suse:enterprise_storage:7.0:*:*:*:*:*:*:*
→[Product]cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8:build14338:*:*:*:*:*:*
→[Product]cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
→[Product]cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*
→[Product]cpe:2.3:a:suse:manager_proxy:4.1:*:*:*:*:*:*:*

MENTIONED_IN (10)

→[Campaign]PCPJack Hijacked 230 AWS, GCP, and Azure Servers to Run a Hidden SMTP Relay Network
→[Campaign]AI-Powered Espionage Campaign Targets Government Linux Infrastructure
→[Campaign]ClingSTUN Turns Vulnerable Edge Devices Into Attacker Infrastructure
→[Campaign]Lunex Uses BYOVD to Disable Security Monitoring and Deploy Persistent Stealer
→[Campaign]Operation Master: Deconstructing a Multi-Tiered Intrusion and Monetization Pipeline
→[Campaign]PATCHCORD: New malware cluster targets Afghan telecom and South Asian critical infrastructure
→[Campaign]NightLedger Backdoor Deployed in Espionage Campaign Targeting the Middle East and Africa
→[Campaign]ClickFix-Themed Campaign Deploys Starland RAT and WLDR Framework
→[Campaign]Thailand's Ministry of Finance Targeted With Hermes AI Agent Running Unattended, Hades Implant Staged
→[Campaign]An Investigation Into Years of Undetected Operations Targeting High-Value Sectors

HAS_WEAKNESS (2)

→[Weakness]Out-of-bounds Write
→[Weakness]Out-of-bounds Read

INVOLVES (2)

←[EmergentSignal]velocity_anomaly
←[Signal]kev_added · 2022-06-27

DESCRIBES (1)

←[KEVEntry]Red Hat Polkit Out-of-Bounds Read and Write Vulnerability

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CVE-2021-4034 (CVSS 7.8) — Ninja Signal Threat Intelligence | Ninja Signal