NULL pointer dereference in Linux Kernel
CVE-2018-7191
In the tun subsystem in the Linux kernel before 4.13.14, dev_get_valid_name is not called before register_netdevice. This allows local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.
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: 0.007 (49.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.launchpad.net/ubuntu/+source/linux/+bug/1743792 (Exploit, Third Party Advisory)
- bugs.launchpad.net/ubuntu/+source/linux/+bug/1748846 (Patch, Third Party Advisory)
- github.com/torvalds/linux/commit/0ad646c81b2182f7fa67ec0c8c825e0ee165696d (Patch, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory, Vendor Advisory)
- github.com/torvalds/linux/commit/5c25f65fd1e42685f7ccd80e0621829c105785d9 (Patch, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.14 (Release Notes, Vendor Advisory)
- www.securityfocus.com/bid/108380 (vdb-entry)
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html (vendor-advisory)
Frequently asked questions
- What is CVE-2018-7191?
- CVE-2018-7191 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2019-05-17.
- How severe is CVE-2018-7191?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2018-7191 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.