Which products and versions are affected by CVE-2021-28664?

Affected: Bifrost Gpu Kernel Driver (Arm); Midgard Gpu Kernel Driver (Arm); Valhall Gpu Kernel Driver (Arm), among others. The full list is in the CVE brief.

Is CVE-2021-28664 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 3, 2021.

Is CVE-2021-28664 in the CISA KEV catalog?

Yes. It was added on Nov 3, 2021 with a federal remediation due date of Nov 17, 2021.

Is there a public exploit for CVE-2021-28664?

Public exploit code is available.

How urgently should CVE-2021-28664 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2021-28664

HighExploitedPublic exploit

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.

Published May 10, 2021 · Updated Oct 14, 2026 · Also known as A-174588870, ASB-A-174588870

Key Facts

Patch immediately

CVE-2021-28664 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Bifrost Gpu Kernel Driver (Arm), Midgard Gpu Kernel Driver (Arm), Valhall Gpu Kernel Driver (Arm) and 1 more product.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 3, 2021. Public exploit code is available.
EPSS estimates a 5.4% probability of exploitation in the next 30 days.
Fixed versions are available, including :unknown: SoCVersion:2021-05-05, Bifrost Gpu Kernel Driver r29p0, Midgard Gpu Kernel Driver r31p0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

8.8

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

EPSS (30-day exploit likelihood)

5.4%

Higher than 92.5% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2021-28664 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Nov 3, 2021	Nov 17, 2021	Not reported
Industry KEV feed	May 3, 2021	Nov 17, 2021	Not reported
CIRCL KEV	Nov 3, 2021	Nov 17, 2021	Not reported
ENISA EUVD	Nov 3, 2021	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

4 affected entries in total

Product	Affected versions	Fixed in
Bifrost Gpu Kernel DriverArm	See advisory	r29p0
Midgard Gpu Kernel DriverArm	See advisory	r31p0
Valhall Gpu Kernel DriverArm	See advisory	r29p0
:unknown:android	>= SoCVersion:0	SoCVersion:2021-05-05

Patched Releases

:unknown:

SoCVersion:2021-05-05

Bifrost Gpu Kernel Driver

r29p0

Midgard Gpu Kernel Driver

r31p0

Valhall Gpu Kernel Driver

r29p0

Timeline

Added to Industry KEV feed
May 3, 2021
Publicly disclosed
May 10, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Oct 14, 2026

Weakness Type

CWE-787 Out-of-bounds Write

References

2 more references in the full CVE brief

FAQ

Common Questions.

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.
Affected: Bifrost Gpu Kernel Driver (Arm); Midgard Gpu Kernel Driver (Arm); Valhall Gpu Kernel Driver (Arm), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 3, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of Nov 17, 2021.
Public exploit code is available.
Fixed versions are available, including :unknown: SoCVersion:2021-05-05, Bifrost Gpu Kernel Driver r29p0, Midgard Gpu Kernel Driver r31p0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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