CVE-2021-28664
Last modified
CVE-2021-28664 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 5.46% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Arm | Bifrost Gpu Kernel Driver | >= r0p0, < r29p0 |
| Arm | Midgard Gpu Kernel Driver | >= r8p0, < r31p0 |
| Arm | Valhall Gpu Kernel Driver | >= r19p0, < r29p0 |
References
- https://developer.arm.com/support/arm-security-updatesVendor Advisory
- https://developer.arm.com/support/arm-security-updatesVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28664US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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