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CVE-2015-4177

CVE-2015-4177

EPSS 0.4%
The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denial of service (system crash) by leveraging user-namespace root access for an MNT_DETACH umount2 system call.
Affected products
n/a · n/a

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References
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4aehttp://openwall.com/lists/oss-security/2015/05/29/10http://openwall.com/lists/oss-security/2015/05/29/5https://bugzilla.redhat.com/show_bug.cgi?id=1248486https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4aehttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5http://www.openwall.com/lists/oss-security/2015/06/04/5