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Release of Invalid Pointer or Reference

CVE-2021-47087

High
7.8/10

Summary

In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix incorrect page free bug Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.

  • LOW
  • LOCAL
  • HIGH
  • UNCHANGED
  • NONE
  • LOW
  • HIGH
  • HIGH

CWE-763 - Release of Invalid Pointer or Reference

The application attempts to return a memory resource to the system, but calls the wrong release function or calls the appropriate release function incorrectly.

References

Advisory Timeline

  • Published