VULNERABILITY INTELLIGENCE

CVE-2021-4002

CVSS score4.4 MEDIUM
EPSS probability0.52%
CISA KEVNot currently listed
Published2022-03-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Description

A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.

Weakness classification

  • CWE-401: Missing Release of Memory after Effective Lifetime
  • CWE-459: Incomplete Cleanup

Primary references