Vulnerability in Linux Kernel
CVE-2014-7975
The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 10.04, 12.04, 14.04
References
- www.ubuntu.com/usn/USN-2418-1 (vendor-advisory, Third Party Advisory)
- secunia.com/advisories/61145 (Broken Link, third-party-advisory)
- exchange.xforce.ibmcloud.com/vulnerabilities/96994 (VDB Entry, Third Party Advisory, vdb-entry)
- www.ubuntu.com/usn/USN-2416-1 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-2417-1 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-2415-1 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-2419-1 (vendor-advisory, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List, Vendor Advisory)
- www.securitytracker.com/id/1031180 (VDB Entry, Third Party Advisory, vdb-entry)
- secunia.com/advisories/60174 (Broken Link, third-party-advisory)
Frequently asked questions
- What is CVE-2014-7975?
- CVE-2014-7975 is a medium-severity vulnerability in Linux Kernel. CVSS score: 5.5/10. Published 2014-10-13.
- How severe is CVE-2014-7975?
- Medium severity. CVSS v3 base score is 5.5 out of 10.