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Bug 1399711 - (CVE-2015-8961) CVE-2015-8961 kernel: Use after free in __ext4_journal_stop
CVE-2015-8961 kernel: Use after free in __ext4_journal_stop
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=moderate,public=20151018,repor...
: Security
Depends On:
Blocks: 1395238
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Reported: 2016-11-29 10:28 EST by Adam Mariš
Modified: 2017-02-09 08:22 EST (History)
36 users (show)

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Doc Text:
A flaw was found in the ext4 subsystem. This vulnerability is a use after free vulnerability was found in __ext4_journal_stop(). Attackers could abuse this to allow any code which attempts to deal with the journal failure to be mishandled or not fail at all. This could lead to data corruption or crashes.
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Last Closed: 2017-02-09 08:22:59 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2016-11-29 10:28:50 EST 
A flaw was found in the ext4 subsystem.  This vulnerability is a use after free vulnerability was found in __ext4_journal_stop() introduced by commit 9705acd63b125dee8b15c705216d7186daea4625.

Attackers could abuse this to allow any code which attempts to deal with the journal failure, to be mishandled or not a failure at all.  This could lead to data corruption or crashes.

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6934da9238da947628be83635e365df41064b09b


Reference:

https://source.android.com/security/bulletin/2016-11-01.html#eop-in-kernel-file-system
Comment 1 Wade Mealing 2016-12-01 23:00:26 EST 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG 2.x. This issue has been rated as having moderate security impact.
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