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 13, 2026 20:36 UTC
CVE-2021-22412: Huawei NPU Kernel Driver Shared Memory Out of Bounds Write
Summary The NPU device’s kernel driver implements a set of ioctl handlers one of which uses unsanitized user data as an offset to retrieve a kernel structure. Fields of the structure are written with user provided values. A malicious actor can use this vulnerability to overwrite kernel memory with controlled data. The mmap handler is exposed through the /dev/davinci0 character device. Due to the applied selinux policy, access to this device is restricted to the hiaiserver system process. Because of these limitations a practical attack would need to target the hiaiserver first. The /dev/davinci0 device exposes a series of ioctl handlers, one of which is devdrv_ioctl_load_stream_buff.
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 13, 2026 20:36 UTC
- Record ID
ff34653a9e06abfe129cf39f0da975175ee29a101b40fd6ddf9c164eb42d6316
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
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