Vulnerability in Linux Kernel
CVE-2015-4177
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Vendor Advisory)
- openwall.com/lists/oss-security/2015/05/29/5 (mailing-list)
- bugzilla.redhat.com/show_bug.cgi
- github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae (Vendor Advisory)
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5
- openwall.com/lists/oss-security/2015/05/29/10 (mailing-list)
- www.openwall.com/lists/oss-security/2015/06/04/5 (mailing-list)
Frequently asked questions
- What is CVE-2015-4177?
- CVE-2015-4177 is a medium-severity vulnerability in Linux Kernel. CVSS score: 5.5/10. Published 2016-05-02.
- How severe is CVE-2015-4177?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2015-4177 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.