Bug 1986473 (CVE-2021-3669) - CVE-2021-3669 kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts
Summary: CVE-2021-3669 kernel: reading /proc/sysvipc/shm does not scale with large sha...
Keywords:
Status: NEW
Alias: CVE-2021-3669
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: 1987128 1987129 1987130 1988923
Blocks: 1985504
TreeView+ depends on / blocked
 
Reported: 2021-07-27 16:25 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-09-15 05:47 UTC (History)
44 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the Linux kernel. Measuring usage of the shared memory does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS.
Clone Of:
Environment:
Last Closed:


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Description Guilherme de Almeida Suckevicz 2021-07-27 16:25:21 UTC
A flaw was found in the Linux kernel. Reading /proc/sysvipc/shm does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS.

Comment 8 Wade Mealing 2021-08-02 06:04:00 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1988923]

Comment 9 Salvatore Bonaccorso 2021-08-03 17:02:08 UTC
Has this issue been reported upstream? Is there any reference to it?

Comment 10 Wade Mealing 2021-08-04 00:47:38 UTC
Not reported upstream, patches are being worked on.  It is not considered high impact because of the requirements and need to have massive amount of shm (usually well above ulimits) 

Product bug https://bugzilla.redhat.com/show_bug.cgi?id=1980619

Comment 11 Guilherme de Almeida Suckevicz 2021-08-04 12:57:59 UTC
In reply to comment #9:
> Has this issue been reported upstream? Is there any reference to it?

Please see comment#10.
Thanks.


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