Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.7, < 3.16.65 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Mrg | 2.0 |
| Debian | Debian Linux | 8.0 |
| Canonical | Ubuntu Linux | 14.04 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/106253Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:1873Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1891Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2696Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2730Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3309Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3517Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0204Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16884Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlMailing ListThird Party Advisory
- https://patchwork.kernel.org/cover/10733767/PatchVendor Advisory
- https://patchwork.kernel.org/patch/10733769/PatchVendor Advisory
- https://support.f5.com/csp/article/K21430012Third Party Advisory
FAQ
What is CVE-2018-16884?
CVE-2018-16884 is a vulnerability with a CVSS score of 8.0 (HIGH). 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-aft...
How severe is CVE-2018-16884?
CVE-2018-16884 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-16884?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux, Redhat Enterprise Mrg, Debian Debian Linux, Canonical Ubuntu Linux.