intelligence_src_350d40f2cc69277bca
- Source-provided label
- Publisher RSS metadata
- Evidence class
- mentioned in report
- Confidence
- Not reported
- Observed
- Aug 02, 2021 00:00 UTC
- Retrieved
- Oct 14, 2026 08:37 UTC
CVE-2021-22388: Huawei NPU Kernel Driver Function Pointer Overwrite
Summary The NPU device’s kernel driver implements a set of ioctl handlers one of which uses unsanitized user data as an index into a function pointer array. The user provided values can exceed the boundaries of the legitimate array and might cause user controlled values to be called as function pointers. A malicious actor can use this vulnerability to hijack the control flow of the kernel and call arbitrary functions with controlled parameters. The function pointer callsite is protected by clang’s CFI, which reduces the number of function that can be called through this primitive. The mmap handler is exposed through the /dev/davinci0 character device.
Reference details
- Source category
- research-report
- First reported
- Aug 02, 2021 00:00 UTC
- Last reported
- Aug 02, 2021 00:00 UTC
- Catalog updated
- Oct 14, 2026 08:37 UTC
- Record ID
e4897c99ce4195a5692a62d58b860e12b3946b87afb909647435bddb91dc1e17
Published indicators
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Source observations
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Feed collection status
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1 sources: 0 stale, 0 needing attention, 0 paused, 0 unverified.
Review source update dates and status
- intelligence_src_350d40f2cc69277bcaRecent successful batchLast successful batch: Last attempt:
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