CVE-2021-47274 in Linux
Sumário
de VulDB • 18/06/2026
No.
The issue described is not related to the `anon_vma_clone` function or the `munmap` system call shown in the first call trace. Instead, it is a separate bug in the ftrace/kprobe subsystem where `strncpy_from_unsafe` performs an out-of-bounds write due to insufficient length checking in the filter buffer handling code. The commit `b220c049d519` attempted to fix a similar overflow but did not account for the size of `entry->array[0]`, which contributes to the buffer usage and potential overflow. This is a distinct problem from the anonymous VMA cloning issue.
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