# CVE-2021-28663

The Arm Mali GPU kernel driver allows privilege escalation or information disclosure because GPU memory operations are mishandled, leading to a use-after-free. This affects Bifrost r0p0 through r28p0 before r29p0, Valhall r19p0 through r28p0 before r29p0, and Midgard r4p0 through r30p0.

- Page: https://www.vulneraibility.com/cve/CVE-2021-28663
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17
- EPSS: 12.08% (percentile 96.2)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2021-09-01)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2024-07-24)
- Weakness: CWE-416
- Published: 2021-05-10

## Affected

- arm:bifrost_gpu_kernel_driver
- arm:midgard_gpu_kernel_driver
- arm:valhall_gpu_kernel_driver

## References

- [other] https://developer.arm.com/support/arm-security-updates
- [other] https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver
- [other] https://github.com/lntrx/CVE-2021-28663
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28663

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.