CVE-2021-3759

MEDIUM5.5

A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a user calls the semget function multiple times, creating semaphores

Published Aug 23, 2022

Modified 1 years ago

Details

A memory overflow vulnerability was found in the Linux kernel’s ipc functionality of the memcg subsystem, in the way a user calls the semget function multiple times, creating semaphores. This flaw allows a local user to starve the resources, causing a denial of service. The highest threat from this vulnerability is to system availability.

References

WEBhttps://access.redhat.com/security/cve/CVE-2021-3759 WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=1999675 WEBhttps://lists.debian.org/debian-lts-announce/2022/12/msg00031.html WEBhttps://lore.kernel.org/linux-mm/1626333284-1404-1-git-send-email-nglaive%40gmail.com/ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2021-3759

CVSS Analysis

CVSS v3.1

5.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

5.5/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

Resource Management

CWE-400

Resource Exhaustion

Ecosystems

Timeline

PublishedAug 23, 2022

ModifiedAug 3, 2024