Bug 730917 - (CVE-2011-2942) CVE-2011-2942 kernel: bridge: null pointer dereference in __br_deliver
CVE-2011-2942 kernel: bridge: null pointer dereference in __br_deliver
Status: CLOSED ERRATA
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
public=20111020,reported=20110816,sou...
: Security
Depends On: 703045 730756 730949 730950 748679
Blocks: 730794
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Reported: 2011-08-16 04:50 EDT by Eugene Teo (Security Response)
Modified: 2016-03-04 07:40 EST (History)
21 users (show)

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Doc Type: Bug Fix
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Last Closed: 2012-05-10 04:17:32 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Eugene Teo (Security Response) 2011-08-16 04:50:57 EDT
In the br_forward_finish() function, we may call kfree() on the skb we are forwarding, and so, after it, we should not dereference skb->dev pointer. With the fix, we save skb->dev before calling the br_forward_finish() function, so that we can use it afterwards.
Comment 4 Eugene Teo (Security Response) 2011-09-20 03:04:03 EDT
Statement:

This issue did not affect the Linux kernel as shipped with Red Hat Enterprise Linux 4, 6, and Red Hat Enterprise MRG. This has been addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2011-1386.html.
Comment 6 errata-xmlrpc 2011-10-20 13:29:02 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:1386 https://rhn.redhat.com/errata/RHSA-2011-1386.html
Comment 7 Eugene Teo (Security Response) 2011-10-24 23:52:27 EDT
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 748679]
Comment 8 errata-xmlrpc 2011-10-26 11:32:46 EDT
This issue has been addressed in following products:

  RHEV-H, V2V and Agents for RHEL-5

Via RHSA-2011:1408 https://rhn.redhat.com/errata/RHSA-2011-1408.html

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