CVE-2019-18806

Name: CVE-2019-18806
Creator: NVD / NIST
Published: 2019-11-07T16:15:11.233+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2019-18806 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A memory leak in the ql_alloc_large_buffers() function in drivers/net/ethernet/qlogic/qla3xxx.c in the Linux kernel before 5.3.5 allows local users to cause a denial of service (memory consumption) by triggering pci_dma_mapping_error() failures, aka CID-1acb8f2a7a9f.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

A memory leak in the ql_alloc_large_buffers() function in drivers/net/ethernet/qlogic/qla3xxx.c in the Linux kernel before 5.3.5 allows local users to cause a denial of service (memory consumption) by triggering pci_dma_mapping_error() failures, aka CID-1acb8f2a7a9f.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.35%

26.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.3.5

References

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.5Mailing List, Vendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1acb8f2a7a9f10543868ddd737e37424d5c36cf4Mailing List, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.5Mailing List, Vendor Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1acb8f2a7a9f10543868ddd737e37424d5c36cf4Mailing List, Patch, Third Party Advisory

Timeline

Published: Nov 7, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18806?

How severe is CVE-2019-18806?

CVE-2019-18806 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18806?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18806?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST