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Fencer Vulns
medium 4.1

CVE-2019-16089 json

An issue was discovered in the Linux kernel through 5.2.13.

published 2019-09-06 7 y ago modified 2026-10-08 31 d ago also EUVD-2019-6936

cvss
4.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does not check the nla_nest_start_noflag return value.

Patch / fix

  • linux Ubuntu 18.04 LTS 4.15.0-109.110
  • linux Ubuntu 20.04 LTS 5.4.0-42.46
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1077.81
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1020.20
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1080.90~16.04.1
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1021.21
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-112.113~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.3.0-64.58~18.04.1

ubuntu advisories UBUNTU-CVE-2019-16089

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-16089 updated cvss 4.1

kernel: Improper return check in nbd_genl_status function in drivers/block/nbd.c

  • Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +82 more
    affected: workaround, no fix available “To mitigate this issue, prevent module nbd from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.”
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
31 d ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.1 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.