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: CLOSED ERRATA
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:
URL:
Whiteboard:
Depends On: 1999705 1999706 1999707
Blocks: 1984846
TreeView+ depends on / blocked
 
Reported: 2021-08-31 14:39 UTC by Alex
Modified: 2023-07-11 10:48 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.
Clone Of:
Environment:
Last Closed: 2022-05-11 10:15:34 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2022:2229 0 None None None 2022-05-12 11:26:32 UTC
Red Hat Product Errata RHBA-2022:4630 0 None None None 2022-05-18 11:46:18 UTC
Red Hat Product Errata RHBA-2022:4693 0 None None None 2022-05-19 05:10:44 UTC
Red Hat Product Errata RHBA-2022:4969 0 None None None 2022-06-08 18:39:52 UTC
Red Hat Product Errata RHBA-2022:5088 0 None None None 2022-06-16 11:23:06 UTC
Red Hat Product Errata RHSA-2022:1975 0 None None None 2022-05-10 14:39:34 UTC
Red Hat Product Errata RHSA-2022:1988 0 None None None 2022-05-10 14:45:18 UTC

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/
Comment 10 errata-xmlrpc 2022-05-10 14:39:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975
Comment 11 errata-xmlrpc 2022-05-10 14:45:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988
Comment 12 Product Security DevOps Team 2022-05-11 10:15:31 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-3759
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