CVE-2015-4178

The fs_pin implementation in the Linux kernel before 4.0.5 does not ensure the internal consistency of a certain list data structure, 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, related to fs/fs_pin.c and include/linux/fs_pin.h.

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=820f9f147dcce2602eefd9b575bbbd9ea14f0953
• http://openwall.com/lists/oss-security/2015/05/29/10
• http://openwall.com/lists/oss-security/2015/05/29/5Patch
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5Vendor Advisory
• http://www.openwall.com/lists/oss-security/2015/06/04/5
• https://bugzilla.redhat.com/show_bug.cgi?id=1249849
• https://github.com/torvalds/linux/commit/820f9f147dcce2602eefd9b575bbbd9ea14f0953Patch, Vendor Advisory
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=820f9f147dcce2602eefd9b575bbbd9ea14f0953
• http://openwall.com/lists/oss-security/2015/05/29/10
• http://openwall.com/lists/oss-security/2015/05/29/5Patch
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5Vendor Advisory
• http://www.openwall.com/lists/oss-security/2015/06/04/5
• https://bugzilla.redhat.com/show_bug.cgi?id=1249849
• https://github.com/torvalds/linux/commit/820f9f147dcce2602eefd9b575bbbd9ea14f0953Patch, Vendor Advisory

Published

May 2, 2016

Last Modified

Jun 17, 2026

Status

Modified

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