Bug 961794 - Kernel: TunTap: refuse to re-attach to different tun_struct
Kernel: TunTap: refuse to re-attach to different tun_struct
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
low Severity low
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Assigned To: Red Hat Product Security
: Security
Depends On:
Blocks: 904467
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Reported: 2013-05-10 08:13 EDT by Prasad J Pandit
Modified: 2015-07-31 03:06 EDT (History)
26 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-05-10 10:28:22 EDT
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Description Prasad J Pandit 2013-05-10 08:13:19 EDT
Linux kernels built with Universal TUN/TAP device driver(CONFIG_TUN) that
includes multiqueue - ioctl(TUNSETQUEUE) - support, is vulnerable to a kernel
crash while attaching a device to a new queue.

A user/program could use this flaw to crash the system resulting in DoS.

Upstream fix:
 -> https://git.kernel.org/linus/6e331f4c83021e4de2a2fc4981574b5d5b16c425
 -> https://git.kernel.org/linus/7c0c3b1a8a175437991ccc898ed66ec5e4a96208
Comment 1 Prasad J Pandit 2013-05-10 08:53:24 EDT

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

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