CVE-2021-28664

HIGH8.8

CISA KEV

Published 2021-05-10 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2021-28664 is a high-severity (CVSS 8.8) vulnerability in Arm Mali Graphics Processing Unit (GPU). CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by November 17, 2021. CISA does not currently list it as used in ransomware campaigns. Arm has 9 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 9 known-exploited Arm vulnerabilities →

Description

The Arm Mali GPU kernel driver allows privilege escalation or a denial of service (memory corruption) because an unprivileged user can achieve read/write access to read-only pages. This affects Bifrost r0p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r8p0 through r30p0 before r31p0.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-787CWE-787

CISA Known-Exploited Vulnerability

Product: Arm — Mali Graphics Processing Unit (GPU)

Name: Arm Mali Graphics Processing Unit (GPU) Unspecified Vulnerability

Date added: 2021-11-03 · Due: 2021-11-17

Required action: Apply updates per vendor instructions.

References

View on NVD

More exploited Arm vulnerabilities

Most recently added to CISA KEV

CVE-2024-4610
Mali GPU Kernel Driver — Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
added 2024-06-12
CVE-2023-4211
Mali GPU Kernel Driver — Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
added 2023-10-03
CVE-2021-29256
Mali Graphics Processing Unit (GPU) — Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
added 2023-07-07
CVE-2023-26083
Mali Graphics Processing Unit (GPU) — Arm Mali GPU Kernel Driver Information Disclosure Vulnerability
added 2023-04-07
CVE-2022-38181
Mali Graphics Processing Unit (GPU) — Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
added 2023-03-30
CVE-2022-22706
Mali Graphics Processing Unit (GPU) — Arm Mali GPU Kernel Driver Unspecified Vulnerability
added 2023-03-30

View all →

Related CVEs

Same severity, most recent

CVE-2026-96660
The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Checkbox Field Value in all versions up to, and including, 5.2.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The nopriv AJAX action user_registration_user_form_submit reaches ur_process_registration() without nonce validation, meaning any unauthenticated request can reach the vulnerable code path.
2026-10-17 · score 7.2
CVE-2026-92798
The User Registration & Membership plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 5.2.8 This is due to insufficient input sanitization in the 'referrer_url' branch of UR_Smart_Tags::process(), where the attacker-controlled HTTP_REFERER header is only passed through sanitize_text_field() — which does not strip WordPress shortcode delimiters — before being substituted into a Content Restriction message that is subsequently executed via apply_shortcodes()/do_shortcode(). This makes it possible for unauthenticated attackers to execute arbitrary registered shortcodes on any restricted page whose message uses the supported {{referrer_url}} smart tag.
2026-10-17 · score 8.1
CVE-2026-108123
The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to read the stored notification email body of any booking by iterating booking_id and email_log_id, exposing customer PII including names, email addresses, phone numbers, messages, and booking dates intended to be visible only to administrators. This is exploitable by any Subscriber-level user because admin_init fires on profile.php, a wp-admin page accessible to all authenticated users.
2026-10-17 · score 7.5
CVE-2026-103899
The EU VAT Assistant for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vat_number' parameter in all versions up to, and including, 2.1.30.260413 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The stored payload executes in the administrator's browser context when reviewing an order via WooCommerce → Orders → Edit Order, enabling privilege escalation up to and including full site takeover via rogue administrator account creation.
2026-10-17 · score 7.2
CVE-2026-109208
The LearnPress – WordPress LMS Plugin for Create and Sell Online Courses plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'quantity (REST) / order_comments (checkout)' parameter in all versions up to, and including, 4.4.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. With guest checkout enabled the attack is fully unauthenticated; with guest checkout disabled, any Subscriber-level user can exploit both vectors through their own checkout.
2026-10-17 · score 7.2