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Linux Kernel amdxdna GPU Memory Mapper Obtains References to Objects Already Being Released, Creating a Use-After-Free in aie2_populate_range

Last refreshed2026-09-29

Status: NEW  |  Advisory ID: CVE-2026-72328

Key Details

CVECVE-2026-72328
CVSS Score / Version7.8 (High) / CVSS v3.1
Updated2026-08-17
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Proseattack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.

What to Know

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. (NVD)

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-72328
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-72328