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Fencer Intel
high 7.5

CVE-2019-16995 json

In the Linux kernel before 5.0.3, a memory leak exits in hsr_dev_finalize() in net/hsr/hsr_device.c if hsr_add_port fails to add a port, wh…

published 7y ago modified 4mo ago also EUVD-2019-7471

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.5%
EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

In the Linux kernel before 5.0.3, a memory leak exits in hsr_dev_finalize() in net/hsr/hsr_device.c if hsr_add_port fails to add a port, which may cause denial of service, aka CID-6caabe7f197d.

Patch / fix

  • linux linux_kernel 3.18.137, 4.4.177, 4.9.164, 4.14.107, 4.19.30, 4.20.17, 5.0.3
  • linux Debian 14, Debian 13, Debian 12 4.19.37-1

debian advisories DEBIAN-CVE-2019-16995

  • linux Ubuntu 16.04 LTS 4.4.0-148.174
  • linux Ubuntu 18.04 LTS 4.15.0-60.67
  • linux-aws Ubuntu 14.04 LTS 4.4.0-1044.47
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1083.93
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1047.49
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1041.43
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1042.45
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-60.67~16.04.1

ubuntu advisories UBUNTU-CVE-2019-16995

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

  • kernel-azure SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-16.7.1
  • kernel-syms-azure SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-16.7.1
  • kernel-source-azure SLES for SAP 12 SP5, SLES 12 SP5 4.12.14-16.7.1
  • kernel-rt Real Time Module 15 SP1 4.12.14-14.14.3
  • kernel-syms-rt Real Time Module 15 SP1 4.12.14-14.14.2
  • kernel-rt_debug Real Time Module 15 SP1 4.12.14-14.14.3
  • kernel-source-rt Real Time Module 15 SP1 4.12.14-14.14.2
  • kernel-rt SLE Real Time 12 SP4 4.12.14-8.9.3

suse advisories SUSE-SU-2020:0093-1SUSE-SU-2019:3295-1SUSE-SU-2019:3294-1SUSE-SU-2019:3200-1SUSE-SU-2019:2946-1SUSE-SU-2019:2984-1

  • kernel-syms openSUSE Leap 15.0 4.12.14-lp150.12.82.1
  • kernel-obs-qa openSUSE Leap 15.0 4.12.14-lp150.12.82.1
  • kernel-source openSUSE Leap 15.0 4.12.14-lp150.12.82.1
  • kernel-default openSUSE Leap 15.0 4.12.14-lp150.12.82.1
  • kernel-vanilla openSUSE Leap 15.0 4.12.14-lp150.12.82.1
  • kernel-kvmsmall openSUSE Leap 15.0 4.12.14-lp150.12.82.1
  • kernel-obs-build openSUSE Leap 15.0 4.12.14-lp150.12.82.1
  • kernel-syms openSUSE Leap 15.1 4.12.14-lp151.28.25.1

opensuse advisories openSUSE-SU-2019:2503-1openSUSE-SU-2019:2444-1

Is CVE-2019-16995 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2019-16995 updated cvss 2.5

kernel: Memory leak in hsr_dev_finalize() in net/hsr/hsr_device.c

  • 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 Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 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

Exploit prediction

3.53% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • cdn.kernel.org https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime
Technology feeds

References

Sources

Fencer Intel 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.