Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2021-4002

Disclosure Date: March 03, 2022 •
CVE-2021-4002 CVSS v3 Base Score: 4.4
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
4.4 Medium
Impact Score:
2.5
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
Low
Availability (A):
None

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
kernel affects kernel v3.6 and later through v5.15.5.
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • fedoraproject,
  • linux,
  • oracle

Products

  • communications cloud native core binding support function 22.1.3,
  • communications cloud native core network exposure function 22.1.1,
  • communications cloud native core policy 22.2.0,
  • debian linux 10.0,
  • debian linux 9.0,
  • fedora 35,
  • linux kernel,
  • linux kernel 5.16
Technical Analysis