accel/amdxdna: Fix potential amdxdna_umap lifetime race (CVE-2026-72328) | HOL Guard CVE

High · CVSS 7.8CVE-2026-72328

accel/amdxdna: Fix potential amdxdna_umap lifetime race

Answer in brief

CVE-2026-72328 records a High severity (CVSS 7.8) vulnerability in accel/amdxdna: Fix potential amdxdna_umap lifetime race. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. 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.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=e486147c912f653ef4b60a6c7dbd4168a4c56a9f <267809e2c56fbea486f7250c8a4acddcc3c54dc5 \|\| >=e486147c912f653ef4b60a6c7dbd4168a4c56a9f <91e8109ecffb925b6202d2737384df285b195bfb \|\| >=e486147c912f653ef4b60a6c7dbd4168a4c56a9f <14f172eff9c19f8043a9858845f33cd034f3a41e	267809e2c56fbea486f7250c8a4acddcc3c54dc5, 91e8109ecffb925b6202d2737384df285b195bfb, 14f172eff9c19f8043a9858845f33cd034f3a41e
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 267809e2c56fbea486f7250c8a4acddcc3c54dc5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix potential amdxdna_umap lifetime race amdxdna_umap_release() calls the blocking mmu_interval_notifier_remove() before removing the object from abo->mem.umap_list. If aie2_populate_range() runs concurrently, it may obtain a reference to an amdxdna_umap that is being released, leading to a potential use-after-free. Use kref_get_unless_zero() in aie2_populate_range() when acquiring a reference. If the reference count has already dropped to zero, release is in progress and the entry is skipped.

Quoted source text, attributed separately from HOL analysis.