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cuda.core: validate IPC descriptor lengths before import (Glasswing V2.1/V7.1) - #2223
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Andy-Jost merged 2 commits intoJun 15, 2026
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Reject truncated buffer and event IPC descriptors before memcpy or deviceptr_import_ipc can read past the peer-supplied payload (Glasswing V2.1 / V7.1, NVBugs 6268888 / 6268898).
This was referenced Jun 15, 2026
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mdboom
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Jun 15, 2026
Resolve test_errors.py conflict: keep both truncated-descriptor and negative-fd rejection tests.
Andy-Jost
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June 15, 2026 21:06
Andy-Jost
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Jul 8, 2026
Add a Highlights section, backfill PR/issue links on New features entries, and add Bug fixes entries for the v1.1.0 IPC import hardening (NVIDIA#2219, NVIDIA#2223, NVIDIA#2224), the ManagedBuffer.accessed_by torn-state fix (NVIDIA#2222), and graph node attachment lifetimes (NVIDIA#2280). Highlights (per review): the .pyi type-stub support and the new cuda.core.texture module; NVLink enumeration is covered in New features / Bug fixes rather than as a highlight. Also adds a New features entry for the cuda.core.texture module (NVIDIA#467, NVIDIA#2095, NVIDIA#2307).
Andy-Jost added a commit
to Andy-Jost/cuda-python
that referenced
this pull request
Jul 8, 2026
Add a Highlights section, backfill PR/issue links on New features entries, and add Bug fixes entries for the v1.1.0 IPC import hardening (NVIDIA#2219, NVIDIA#2223, NVIDIA#2224), the ManagedBuffer.accessed_by torn-state fix (NVIDIA#2222), and graph node attachment lifetimes (NVIDIA#2280). Highlights (per review): the .pyi type-stub support and the new cuda.core.texture module; NVLink enumeration is covered in New features / Bug fixes rather than as a highlight. Also adds a New features entry for the cuda.core.texture module (NVIDIA#467, NVIDIA#2095, NVIDIA#2307).
Andy-Jost added a commit
that referenced
this pull request
Jul 8, 2026
* docs(core): finalize 1.1.0 release notes Add a Highlights section, backfill PR/issue links on New features entries, and add Bug fixes entries for the v1.1.0 IPC import hardening (#2219, #2223, #2224), the ManagedBuffer.accessed_by torn-state fix (#2222), and graph node attachment lifetimes (#2280). Highlights (per review): the .pyi type-stub support and the new cuda.core.texture module; NVLink enumeration is covered in New features / Bug fixes rather than as a highlight. Also adds a New features entry for the cuda.core.texture module (#467, #2095, #2307). * Reorder API refs + ensure each section has currentmodule the compilation toolchain is one of the unique selling points of cuda.core, but we are burying it deeply --------- Co-authored-by: Leo Fang <leof@nvidia.com>
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Summary
Addresses two related Glasswing IPC import findings: peer-supplied descriptor payloads shorter than the driver struct size could be read past bounds during buffer pointer import or event-handle memcpy.
Changes
cuda_core/cuda/core/_memory/_ipc.pyx: rejectIPCBufferDescriptorpayloads smaller thansizeof(CUmemPoolPtrExportData)beforedeviceptr_import_ipc(V2.1)cuda_core/cuda/core/_event.pyx: rejectIPCEventDescriptorreserved fields smaller thansizeof(CUipcEventHandle)beforememcpy(V7.1)cuda_core/tests/memory_ipc/test_errors.py:test_import_truncated_buffer_descriptorcuda_core/tests/test_event.py:test_import_truncated_event_descriptorTest Coverage
ValueErrorbefore driver import (IPC fixture)ValueErrorbefore memcpy (no GPU required)Related Work