Bug 1999675 (CVE-2021-3759) - CVE-2021-3759 kernel: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks
Summary: CVE-2021-3759 kernel: unaccounted ipc objects in Linux kernel lead to breakin...
Keywords:
Status: NEW
Alias: CVE-2021-3759
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Depends On: 1999705 1999706 1999707
Blocks: 1984846
TreeView+ depends on / blocked
 
Reported: 2021-08-31 14:39 UTC by Alex
Modified: 2021-09-24 08:30 UTC (History)
39 users (show)

Fixed In Version: Linux kernel 5.15-rc1
Doc Type: If docs needed, set a value
Doc Text:
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.
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Description Alex 2021-08-31 14:39:34 UTC
There is a missing-accounting vulnerability in memcg subsystem of Linux kernel, leading to out of memory and then host system crashes because of this.

Reference:
https://lore.kernel.org/linux-mm/1626333284-1404-1-git-send-email-nglaive@gmail.com/


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