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Bug 1362457 - (CVE-2016-6516) CVE-2016-6516 kernel: vfs: ioctl: double fetch leading to heap overflow
CVE-2016-6516 kernel: vfs: ioctl: double fetch leading to heap overflow
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20160731,repo...
: Security
Depends On: 1362458
Blocks:
  Show dependency tree / graph
 
Reported: 2016-08-02 04:53 EDT by Martin Prpič
Modified: 2016-08-02 04:54 EDT (History)
33 users (show)

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Last Closed: 2016-08-02 04:54:28 EDT
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Description Martin Prpič 2016-08-02 04:53:22 EDT 
It was found that a commit which moved certain functionality from btrfs to vfs ioctl introduced a double fetch issue:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/fs/ioctl.c?h=v4.5&id=54dbc15172375641ef03399e8f911d7165eb90fb

This flaw could lead to an undersized allocation and subsequent heap overflow with potentially controlled data. It has been patched in upstream here:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20

CVE request:

http://seclists.org/oss-sec/2016/q3/213
Comment 1 Martin Prpič 2016-08-02 04:54:03 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1362458]
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