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Use After Free

CVE-2022-43680

High
7.5/10

Summary

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in "XML_ExternalEntityParserCreate" in out-of-memory situations.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-416 - Use After Free

Use-after-free (UaF) vulnerability occurs when the application is using a pointer to memory that has been freed. Any attempt to read/write to a buffer after it is de-allocated allows memory corruption, sensitive information exposure, and can potentially lead to arbitrary code execution.

References

Advisory Timeline

  • Published