NULL pointer dereference in Linux Kernel
CVE-2018-1000200
The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process's final thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen synchronously with the oom reaper's unmap_page_range() since the vma's VM_LOCKED bit is cleared before munlocking (to determine if any other vmas share the memory and are mlocked).
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: 0.005 (39.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.0% 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 — versions 4.14, 4.15, 4.16
Weakness classification (CWE)
References
- usn.ubuntu.com/3752-2/ (vendor-advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mitigation, Vendor Advisory)
- usn.ubuntu.com/3752-3/ (vendor-advisory)
- access.redhat.com/security/cve/cve-2018-1000200 (Third Party Advisory)
- marc.info/ (mailing-list, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2948 (vendor-advisory)
- www.securityfocus.com/bid/104397 (VDB Entry, Third Party Advisory, vdb-entry)
- marc.info/ (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3752-1/ (vendor-advisory)
- seclists.org/oss-sec/2018/q2/67 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-1000200?
- CVE-2018-1000200 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-06-05.
- How severe is CVE-2018-1000200?
- Medium severity. CVSS v3 base score is 5.5 out of 10.