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Fencer Vulns
high 7.5

CVE-2019-19079 json

A memory leak in the qrtr_tun_write_iter() function in net/qrtr/tun.c in the Linux kernel before 5.3 allows attackers to cause a denial of…

published 2019-11-18 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8718

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

A memory leak in the qrtr_tun_write_iter() function in net/qrtr/tun.c in the Linux kernel before 5.3 allows attackers to cause a denial of service (memory consumption), aka CID-a21b7f0cff19.

Patch / fix

  • linux linux_kernel 4.19.89, 5.3
  • linux Debian 14, Debian 13, Debian 12 5.3.7-1

debian advisories DEBIAN-CVE-2019-19079

  • linux-gcp Ubuntu 18.04 LTS 5.0.0-1029.30~18.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.3.0-26.28~18.04.1
  • linux-azure Ubuntu 18.04 LTS 5.0.0-1029.31~18.04.1
  • linux-aws-5.0 Ubuntu 18.04 LTS 5.0.0-1024.27~18.04.1
  • linux-gke-5.0 Ubuntu 18.04 LTS 5.0.0-1029.30~18.04.1
  • linux-oem-osp1 Ubuntu 18.04 LTS 5.0.0-1037.42
  • linux-oracle-5.0 Ubuntu 18.04 LTS 5.0.0-1010.15~18.04.1

ubuntu advisories UBUNTU-CVE-2019-19079

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-2019-19079 updated cvss 7.5

kernel: memory leak in the qrtr_tun_write_iter() function in net/qrtr/tun.c leads to DoS

  • 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

3.30% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

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 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.