CVE-2019-19074

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-11-18 · updated 2026-06-17
Weakness: CWE-401

Description

A memory leak in the ath9k_wmi_cmd() function in drivers/net/wireless/ath/ath9k/wmi.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption), aka CID-728c1e2a05e4.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 18.04
Debian Linux: 9.0
Linux kernel: before 4.4.233; from 4.5 before 4.9.233; from 4.10 before 4.14.192; from 4.15 before 4.19.137; from 4.20 before 5.4 — fixed in 4.14.192, 4.19.137, 4.4.233, 4.9.233, 5.4

How to fix

Upgrade to a fixed version: Linux kernel 4.14.192, 4.19.137, 4.4.233, 4.9.233. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
https://github.com/torvalds/linux/commit/728c1e2a05e4b5fc52fab3421dce772a806612a2
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3PSDE6PTOTVBK2YTKB2TFQP2SUBVSNF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PY7LJMSPAGRIKABJPDKQDTXYW3L5RX2T/
https://security.netapp.com/advisory/ntap-20191205-0001/
https://usn.ubuntu.com/4526-1/
https://usn.ubuntu.com/4527-1/
https://www.oracle.com/security-alerts/cpuApr2021.html
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
https://github.com/torvalds/linux/commit/728c1e2a05e4b5fc52fab3421dce772a806612a2

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