What is CVE-2018-5333?

CVE-2018-5333 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-01-11.

How severe is CVE-2018-5333?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2018-5333 known to be exploited?

14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Linux Kernel

CVE-2018-5333

In the Linux kernel through 4.14.13, the rds_cmsg_atomic function in net/rds/rdma.c mishandles cases where page pinning fails or an invalid address is supplied, leading to an rds_atomic_free_op NULL pointer dereference.

Published 2018-01-11 · last modified 2026-06-17.

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: 0.072 (94.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.072 · newest: 0.072 · change: 0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
Debian Linux — versions 7.0, 8.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

References

www.debian.org/security/2018/dsa-4187 (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3617-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3619-2/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3617-3/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3583-2/ (vendor-advisory, Third Party Advisory)
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Issue Tracking, Vendor Advisory)
usn.ubuntu.com/3632-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3583-1/ (vendor-advisory, Third Party Advisory)
www.securityfocus.com/bid/102510 (VDB Entry, Third Party Advisory, vdb-entry)
access.redhat.com/errata/RHSA-2018:0470 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2018-5333?: CVE-2018-5333 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-01-11.
How severe is CVE-2018-5333?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2018-5333 known to be exploited?: 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.