drm/amdgpu: Skip KFD mapping clear before initialization

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98178
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:17:59 UTC
Updated2026-10-06 09:17:59 UTC
DescriptionIn 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)

Risk And Classification

EPSS: 0.001980000 probability, percentile 0.087020000 (date 2026-10-06)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 70cadefcc6160c575b04f763ada34c20e868d577 157d3f1db7e7e6f320daa221fae84a4c13555b6f git Not specified
CNA Linux Linux affected 70cadefcc6160c575b04f763ada34c20e868d577 7f9caa70aef0950e06d395ca0035831214d88187 git Not specified
CNA Linux Linux affected 7.2 Not specified
CNA Linux Linux unaffected 7.2 semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7f9caa70aef0950e06d395ca0035831214d88187 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/157d3f1db7e7e6f320daa221fae84a4c13555b6f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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