bugtraq - [CVE-2016-6136] Double-Fetch Vulnerability in Linux-4.6/kernel/auditsc.c

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Message-Id: <201607041505.u64F5oSi020565@sf01web3.securityfocus.com>
Date: Mon, 4 Jul 2016 15:05:50 GMT
From: wpengfeinudt@...il.com
To: bugtraq@...urityfocus.com
Subject: [CVE-2016-6136] Double-Fetch Vulnerability in Linux-4.6/kernel/auditsc.c

I found this double-fetch vulnerability when I was doing my research on double-fetch issue analysis, and I’d like to make an announcement here. 

This was found in Linux kernel file Linux-4.6/kernel/auditsc.c, and crafted user space data change under race condition will make control strings processed as none-control strings, which could mislead the audit subsystem of Linux kernel.
======================================================
1. Affected Versions: Linux Kernel 4.6 and earlier versions.

2. Detailed description in my report to Kernel Bugzilla:  https://bugzilla.kernel.org/show_bug.cgi?id=120681

3. Patch: This has been confirmed by the maintainers and  patched in the new version:  https://github.com/linux-audit/audit-kernel/issues/18

4. CVE: The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2016-6136 to this issue. 

Kind regards
Pengfei Wang