Bug 1775097 (CVE-2019-19056) - CVE-2019-19056 kernel: A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() function in drivers/net/wireless/marvell/mwifiex/pcie.c allows to cause DoS
Summary: CVE-2019-19056 kernel: A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() f...
Status: NEW
Alias: CVE-2019-19056
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1829227 1829228 1829230 1829231 1775115 1829229
Blocks: 1775108
TreeView+ depends on / blocked
Reported: 2019-11-21 12:10 UTC by msiddiqu
Modified: 2020-05-05 14:22 UTC (History)
48 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the way the mwifiex PCIE 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.
Clone Of:
Last Closed:

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Description msiddiqu 2019-11-21 12:10:30 UTC
A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() function indrivers/net/wireless/marvell/mwifiex/pcie.c allows attackers to cause a denial of service (memory consumption) by triggering mwifiex_map_pci_memory() failures

Upstream commit:


Comment 1 msiddiqu 2019-11-21 12:19:38 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775115]

Comment 5 Petr Matousek 2020-04-29 09:01:48 UTC

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module mwifiex_pcie. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .

Comment 6 Petr Matousek 2020-04-29 09:03:01 UTC

This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (DMA mapping error).

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