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CVE-2014-4171

Severity Medium
Score 4.7/10

Summary

mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement the interaction between range notification and hole punching, which allows local users to cause a denial of service (i_mutex hold) by using the mmap system call to access a hole, as demonstrated by interfering with intended shmem activity by blocking completion of (1) an MADV_REMOVE madvise call or (2) an FALLOC_FL_PUNCH_HOLE fallocate call.

  • MEDIUM
  • LOCAL
  • NONE
  • NONE
  • NONE
  • COMPLETE

References

Advisory Timeline

  • Published