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Date: Fri, 29 May 2015 22:05:26 +0530 (IST)
From: P J P <>
To: oss security list <>
Subject: CVE request Linux kernel: ns: user namespaces panic


Linux kernel built with the user namespaces support(CONFIG_USER_NS) is 
vulnerable to a NULL pointer dereference flaw. It could occur when users in 
user namespaces do unmount mounts.

An unprivileged user could use this flaw to crash the system resulting in DoS.

Upstream fixes:

It was introduced by:

Thank you Drew Fisher for reporting this issue to Fedora Security Team.

Thank you.
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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