accel/amdxdna: Fix use-after-free in amdxdna_gem_dmabuf_mmap() (CVE-2026-72093) | HOL Guard CVE

High · CVSS 7.8CVE-2026-72093

accel/amdxdna: Fix use-after-free in amdxdna_gem_dmabuf_mmap()

Answer in brief

CVE-2026-72093 records a High severity (CVSS 7.8) vulnerability in accel/amdxdna: Fix use-after-free in amdxdna_gem_dmabuf_mmap(). 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 <4e370b5289624f46a356dcc94f9f87025eaa6036 \|\| >=e486147c912f653ef4b60a6c7dbd4168a4c56a9f <5da885c39baa70f570a8be35a78e85a351f33918 \|\| >=e486147c912f653ef4b60a6c7dbd4168a4c56a9f <63bbf9ac5dde2ba85e7b39d0a0b7d540e6252ba4	4e370b5289624f46a356dcc94f9f87025eaa6036, 5da885c39baa70f570a8be35a78e85a351f33918, 63bbf9ac5dde2ba85e7b39d0a0b7d540e6252ba4
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 4e370b5289624f46a356dcc94f9f87025eaa6036 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 use-after-free in amdxdna_gem_dmabuf_mmap() When vm_insert_pages() fails, the error path calls vma->vm_ops->close(vma) which internally calls drm_gem_vm_close() → drm_gem_object_put(), releasing the GEM object reference acquired at the start of the function. However, the close_vma label then falls through to put_obj, which calls drm_gem_object_put() a second time on the same object. If the first put releases the last reference, the object is freed and the second put accesses freed memory, causing a use-after-free. Fix by returning directly from close_vma instead of falling through to put_obj, since the close handler already performs all necessary cleanup including the object put.

Quoted source text, attributed separately from HOL analysis.