Description
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Skip KFD mapping clear before initialization

amdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev
has a fully populated node array. This is not true when KFD device
initialization fails after probe.

For example, kgd2kfd_device_init() sets num_nodes before checking
PCIe atomics support. On Polaris systems without the required atomics,
it returns before allocating nodes[0], but the kfd_dev remains attached
to the amdgpu device. A later GPU reset then dereferences nodes[0]->id.

Require the authoritative KFD initialization flag before walking the
node array, matching the existing KFD reset and teardown paths.

(cherry picked from commit 4ac1835823c47903fbb278bbf474773c46f59edc)
Published: 2026-10-06
Score: n/a
EPSS: < 1% Very Low
KEV: No
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History

Tue, 06 Oct 2026 12:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Tue, 06 Oct 2026 09:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Skip KFD mapping clear before initialization amdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev has a fully populated node array. This is not true when KFD device initialization fails after probe. For example, kgd2kfd_device_init() sets num_nodes before checking PCIe atomics support. On Polaris systems without the required atomics, it returns before allocating nodes[0], but the kfd_dev remains attached to the amdgpu device. A later GPU reset then dereferences nodes[0]->id. Require the authoritative KFD initialization flag before walking the node array, matching the existing KFD reset and teardown paths. (cherry picked from commit 4ac1835823c47903fbb278bbf474773c46f59edc)
Title drm/amdgpu: Skip KFD mapping clear before initialization
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-10-06T08:44:21.602Z

Reserved: 2026-09-25T10:25:14.322Z

Link: CVE-2026-98178

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-06T09:17:59.930

Modified: 2026-10-06T09:17:59.930

Link: CVE-2026-98178

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-06T11:45:17Z

Weaknesses