CVE-2021-4002

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.

CVSS v3.1

4.4 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v2.0

3.6 LOWAV:L/AC:L/Au:N/C:P/I:P/A:N

EPSS

0.52% chance of exploitation in the next 30 days, 42th percentile

Published

2022-03-03

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://www.openwall.com/lists/oss-security/2021/11/25/1

References

• CVE Record
• NVD entry

Related

• CVE-2021-4000
• CVE-2021-4005
• CVE-2021-3999
• CVE-2021-40085
• CVE-2021-3994
• CVE-2021-40101