Bug 1750813 (CVE-2019-15916) - CVE-2019-15916 kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service
Summary: CVE-2019-15916 kernel: memory leak in register_queue_kobjects() in net/core/n...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-15916
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: 1752690 1752691 1752694 1718393 1750814 1752692 1752693 1752695 1752700
Blocks: 1750818
TreeView+ depends on / blocked
 
Reported: 2019-09-10 14:05 UTC by Dhananjay Arunesh
Modified: 2019-11-11 21:40 UTC (History)
47 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw that allowed an attacker to leak kernel memory was found in the network subsystem where an attacker with permissions to create tun/tap devices can create a denial of service and panic the system.
Clone Of:
Environment:
Last Closed: 2019-11-06 00:53:29 UTC


Attachments (Terms of Use)


Links
System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:3309 None None None 2019-11-05 20:35:54 UTC
Red Hat Product Errata RHSA-2019:3517 None None None 2019-11-05 21:06:38 UTC

Description Dhananjay Arunesh 2019-09-10 14:05:41 UTC
An issue was discovered in the Linux kernels network tun/tap device creation. An attacker with local account can issue an ioctl to a device which can cause a small memory leak which can not be reclaimed.  Each time this attack is repeated additional memory is leaked and this may eventually consume all memory in the system causing a denial of service DOS.

Reference:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=895a5e96dbd6386c8e78e5b78e067dcc67b7f0ab

Comment 1 Dhananjay Arunesh 2019-09-10 14:06:12 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1750814]

Comment 2 Justin M. Forbes 2019-09-11 08:14:54 UTC
This was fixed for Fedora with the 4.20.15 stable kernel updates

Comment 4 Wade Mealing 2019-09-17 01:41:05 UTC
This flaw is rated as moderate, it is a memory leak that a requires a a local user to have access privileges on a local network device and the ability to issue an ioctl to a tun/tap device. This is usually a priviledged operation and not available to all users on the system.

Comment 11 errata-xmlrpc 2019-11-05 20:35:51 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3309 https://access.redhat.com/errata/RHSA-2019:3309

Comment 12 errata-xmlrpc 2019-11-05 21:06:35 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3517 https://access.redhat.com/errata/RHSA-2019:3517

Comment 13 Product Security DevOps Team 2019-11-06 00:53:29 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-2019-15916


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