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NULL Pointer Dereference

CVE-2021-38604

High
7.5/10

Summary

In librt in the GNU C Library (aka glibc) in 2.34, "sysdeps/unix/sysv/linux/mq_notify.c" mishandles certain "NOTIFY_REMOVED" data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.

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