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NULL Pointer Dereference

CVE-2021-4158

Medium
6/10

Summary

A NULL pointer dereference issue was found in the ACPI code of QEMU versions prior to v7.0.0-rc0. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

  • LOW
  • LOCAL
  • NONE
  • CHANGED
  • NONE
  • HIGH
  • NONE
  • HIGH

CWE-476 - NULL Pointer Dereference

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

References

Advisory Timeline

  • Published