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Bug 1623610 - (CVE-2018-6554) CVE-2018-6554 kernel: irda: Memory leak caused by repeated binds of irda socket
CVE-2018-6554 kernel: irda: Memory leak caused by repeated binds of irda socket
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=none,public=20180904,reported=...
: Security
Depends On:
Blocks: 1623611
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Reported: 2018-08-29 14:02 EDT by Pedro Sampaio
Modified: 2018-09-10 04:01 EDT (History)
50 users (show)

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Doc Text:
A memory leak in the irda_bind function in net/irda/af_irda.c in the Linux kernel, through 4.16, allows local users to cause a denial of service due to a memory consumption by repeatedly binding an AF_IRDA socket.
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Environment:
Last Closed: 2018-08-30 08:19:10 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Pedro Sampaio 2018-08-29 14:02:14 EDT 
The irda_bind() function allocates memory for self->ias_obj without
checking to see if the socket is already bound. A userspace process
could repeatedly bind the socket, have each new object added into the
LM-IAS database, and lose the reference to the old object assigned to
the socket to exhaust memory resources.

References:

https://seclists.org/oss-sec/2018/q3/212

Suggested patches:

https://www.spinics.net/lists/stable/msg255033.html

https://www.spinics.net/lists/stable/msg255029.html
Comment 5 Vladis Dronov 2018-08-30 08:19:10 EDT 
Notes:

None of the Red Hat's products are vulnerable to this flaw.
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