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Fencer Vulns
medium 5.5

CVE-2019-19043 json

A memory leak in the i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.c in the Linux kernel through 5.3.11 allow…

published 2019-11-18 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8682

cvss
5.5
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 35%
public exploits
0
none known

Summary

A memory leak in the i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering i40e_setup_channel() failures, aka CID-27d461333459.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 5.4.19-1

debian advisories DEBIAN-CVE-2019-19043

  • linux-hwe Ubuntu 18.04 LTS 5.3.0-42.34~18.04.1
  • linux-gcp-5.3 Ubuntu 18.04 LTS 5.3.0-1014.15~18.04.1
  • linux-gke-5.3 Ubuntu 18.04 LTS 5.3.0-1014.15~18.04.1
  • linux-azure-5.3 Ubuntu 18.04 LTS 5.3.0-1016.17~18.04.1
  • linux-raspi2-5.3 Ubuntu 18.04 LTS 5.3.0-1019.21~18.04.1

ubuntu advisories UBUNTU-CVE-2019-19043

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-2019-19043 updated cvss 5.5

kernel: dos in i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.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
    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

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/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 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.