CVE-2026-68238
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: Release VFCT ACPI table reference
amdgpu_acpi_vfct_bios() fetches the VFCT table with acpi_get_table()
but never releases it. acpi_get_table() takes a reference on the
table (incrementing its validation_count and mapping it on the 0->1
transition); without a paired acpi_put_table() the mapping is leaked
on every call, whether or not a matching VBIOS image is found.
Route all exit paths after the table is acquired through a common
acpi_put_table(). The VBIOS image is copied out with kmemdup() before
the table is released, so it remains valid for the caller.
(cherry picked from commit ca5988682b4cba4cd125a0fa99b2de1239164ae4)
CSIRTS triage
- What
- The AMD GPU DRM driver fails to release a reference to the VFCT ACPI table.
- Who is affected
- Linux systems with AMD discrete or integrated GPUs using the amdgpu driver.
- Urgency
- Low priority; resource leak issue that may cause memory exhaustion over time rather than immediate risk.
- Action
- Apply Linux kernel patch for CVE-2026-68238 when available from your distribution.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
Advisory coverage (2)
- lowCVE-2026-68238: drm/amdgpu: Release VFCT ACPI table referencemsrc · 2026-08-11
- unknownCVE-2026-68238: In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Release VFCT A…nvd · 2026-08-10
External references
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