CVE-2019-18806
kernel: memory leak in ql_alloc_large_buffers() function in drivers/net/ethernet/qlogic/qla3xxx.c
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 7, 2019
Updated · October 9, 2026
Description
A flaw was found in the way the QLogic QLA3xxx NIC HBA Driver in the Linux kernel handled resource cleanup on a DMA mapping error. This flaw allows an attacker able to trigger the DMA mapping error to crash the system.
Statement
This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (DMA mapping error).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module qla3xxx. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-400 · Uncontrolled Resource Consumption