Bug 984722 (CVE-2013-4127) - CVE-2013-4127 kernel: vhost-net: use-after-free in vhost_net_flush
Summary: CVE-2013-4127 kernel: vhost-net: use-after-free in vhost_net_flush
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2013-4127
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: 980643 984723
Blocks: 984728
TreeView+ depends on / blocked
 
Reported: 2013-07-15 19:52 UTC by Petr Matousek
Modified: 2021-02-17 07:31 UTC (History)
28 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-07-15 19:55:38 UTC
Embargoed:

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Description Petr Matousek 2013-07-15 19:52:19 UTC 
vhost_net_ubuf_put_and_wait has a confusing name: it will actually also free it's argument. vhost_net_flush tries to use the argument after passing it to vhost_net_ubuf_put_and_wait, this results in use after free.

Upstream fix:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dd7633ecd553a5e304d349aa6f8eb8a0417098c5

Introduced by:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1280c27f8e29acf4af2da914e80ec27c3dbd5c01

Introduced in upstream version:
v3.8-rc1

References:
https://bugzilla.redhat.com/show_bug.cgi?id=980643
http://pkgs.fedoraproject.org/cgit/kernel.git/commit/?h=f19&id=da4ebd83da1869778909f394f6ebd50850ef5fec
Comment 1 Petr Matousek 2013-07-15 19:55:38 UTC 
Statement:

Not vulnerable.

This issue did not affect the kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
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