CVE-2018-16884
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.0 HIGHCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.46% probability · 73th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · redhat/enterprise linux · redhat/enterprise mrg · debian/debian linux · canonical/ubuntu linux
- Source
- secalert@redhat.com
EPSS 1.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/106253Third Party Advisory, VDB 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 Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlMailing List, Third Party Advisory
- https://patchwork.kernel.org/cover/10733767/Patch, Vendor Advisory
- https://patchwork.kernel.org/patch/10733769/Patch, Vendor Advisory
- https://support.f5.com/csp/article/K21430012Third Party Advisory
- https://usn.ubuntu.com/3932-1/Third Party Advisory
- https://usn.ubuntu.com/3932-2/Third Party Advisory
- https://usn.ubuntu.com/3980-1/Third Party Advisory
- https://usn.ubuntu.com/3980-2/Third Party Advisory
- https://usn.ubuntu.com/3981-1/Third Party Advisory
- https://usn.ubuntu.com/3981-2/Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlThird Party Advisory
- http://www.securityfocus.com/bid/106253Third Party Advisory, VDB 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.