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-2021-22390: Huawei NPU Kernel Driver Use-After-Free
Summary Due to a bug in the way mappings are closed it is possible to free a kmallocated memory chunk arbitrary times. This vulnerability can be used to craft a use after free scenario against any kernel structure that is allocated from the kmalloc-64 cache. There is rich public literature on how such use after free vulnerabilities can be utilized to compromise the kernel, achieve code execution in kernel context, and elevate privileges of user space processes. Even when modern mitigation is deployed. 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.
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
d72996b99fa98605ffc796375e2d7f0cc2f4b917752b8c0c922592c6f9a6da12
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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