CVEvulnerability
CVE-2015-4177
5.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2016-05-02
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 5.5 MEDIUM — CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.9 MEDIUM — AV:L/AC:L/Au:N/C:N/I:N/A:C
Description
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 configurations
• linux linux kernel (<= 4.0.4)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae Vendor Advisory
- http://openwall.com/lists/oss-security/2015/05/29/10 openwall.com
- http://openwall.com/lists/oss-security/2015/05/29/5 openwall.com
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5 www.kernel.org
- http://www.openwall.com/lists/oss-security/2015/06/04/5 www.openwall.com
- https://bugzilla.redhat.com/show_bug.cgi?id=1248486 bugzilla.redhat.com
- https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae Vendor Advisory
- http://openwall.com/lists/oss-security/2015/05/29/10 openwall.com
- http://openwall.com/lists/oss-security/2015/05/29/5 openwall.com
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5 www.kernel.org
- http://www.openwall.com/lists/oss-security/2015/06/04/5 www.openwall.com
- https://bugzilla.redhat.com/show_bug.cgi?id=1248486 bugzilla.redhat.com
- https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae Vendor Advisory