Answer in brief
CVE-2021-28663 records a High severity vulnerability in CISA ADP Vulnrichment. The current sources mark it as known exploited. The current feed maps arm/bifrost_gpu_kernel_driver (generic), arm/midgard_gpu_kernel_driver (generic), n/a/n/a (generic), arm/valhall_gpu_kernel_driver (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps arm/bifrost_gpu_kernel_driver (generic), arm/midgard_gpu_kernel_driver (generic), n/a/n/a (generic), arm/valhall_gpu_kernel_driver (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| arm/bifrost_gpu_kernel_drivergeneric | 0 | Not reported |
| arm/midgard_gpu_kernel_drivergeneric | 0 | Not reported |
| n/a/n/ageneric | n/a | Not reported |
| arm/valhall_gpu_kernel_drivergeneric | 0 | Not reported |
Published upstream
May 10, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordThe 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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-28663 records a High severity vulnerability in CISA ADP Vulnrichment. The current sources mark it as known exploited. The current feed maps arm/bifrost_gpu_kernel_driver (generic), arm/midgard_gpu_kernel_driver (generic), n/a/n/a (generic), arm/valhall_gpu_kernel_driver (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps arm/bifrost_gpu_kernel_driver (generic), arm/midgard_gpu_kernel_driver (generic), n/a/n/a (generic), arm/valhall_gpu_kernel_driver (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| arm/bifrost_gpu_kernel_drivergeneric | 0 | Not reported |
| arm/midgard_gpu_kernel_drivergeneric | 0 | Not reported |
| n/a/n/ageneric | n/a | Not reported |
| arm/valhall_gpu_kernel_drivergeneric | 0 | Not reported |
Published upstream
May 10, 2021
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Nov 3, 2021
Evidence: source:kev:kev:kev:recordThe 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.
Quoted source text, attributed separately from HOL analysis.