Bug 1362457 (CVE-2016-6516) - CVE-2016-6516 kernel: vfs: ioctl: double fetch leading to heap overflow
Summary: CVE-2016-6516 kernel: vfs: ioctl: double fetch leading to heap overflow
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-6516
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1362458
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-08-02 08:53 UTC by Martin Prpič
Modified: 2019-09-29 13:54 UTC (History)
33 users (show)

Fixed In Version:
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Last Closed: 2016-08-02 08:54:28 UTC
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Description Martin Prpič 2016-08-02 08:53:22 UTC 
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 08:54:03 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1362458]
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