intelligence_src_350d40f2cc69277bca
- Source-provided label
- Publisher RSS metadata
- Evidence class
- mentioned in report
- Confidence
- Not reported
- Observed
- Sep 22, 2021 00:00 UTC
- Retrieved
- Oct 13, 2026 08:35 UTC
Kernel Vmalloc Use-After-Free in the ION Allocator
Summary In this advisory we are disclosing a vmap/vmalloc use-after-free vulnerability within the Android ION allocator, that impacts most Android devices that utilize ION. The exploitability of the vulnerability depends on how the various kernel drivers use the allocated ION buffers, the version of the kernel and the vendor specific modifications to the ION subsystem. In the most serious cases the vulnerability can be used to corrupt vmallocated kernel buffers, including kernel stacks, to achieve kernel code execution and compromise the integrity of the kernel. The ION allocator went over multiple refactors throughout its evolution, yet the vulnerability persisted within the Android common and the Linux upstream kernel branches.
Reference details
- Source category
- research-report
- First reported
- Sep 22, 2021 00:00 UTC
- Last reported
- Sep 22, 2021 00:00 UTC
- Catalog updated
- Oct 13, 2026 08:35 UTC
- Record ID
cdd4b3e3321cd35b3bb42a11c7078de5d14439c3892de04f926228e3583ab609
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Source observations
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1 sources: 0 stale, 0 needing attention, 0 paused, 0 unverified.
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