Use After Free in Linux Kernel
CVE-2018-16884
A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (72.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Linux Kernel
- [Unknown] Kernel:
- Canonical Ubuntu Linux — versions 14.04, 16.04
- Debian Linux — versions 8.0
- Red Hat Enterprise Linux — versions 7.0
- Red Hat Enterprise Mrg — versions 2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/106253 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.debian.org/debian-lts-announce/2019/03/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/04/msg00004.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3932-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3932-2/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/05/msg00002.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3981-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3980-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3980-2/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3981-2/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-16884?
- CVE-2018-16884 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 8.0/10. Published 2018-12-18.
- How severe is CVE-2018-16884?
- High severity. CVSS v3 base score is 8.0 out of 10.
- Is CVE-2018-16884 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.