Memory leak in Linux kernel - CVE-2019-19056

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Main Vulnerability Database Vulnerabilities #VU23020

Memory leak in Linux kernel - CVE-2019-19056

Published: November 27, 2019


Vulnerability identifier: #VU23020
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-19056
CWE-ID: CWE-401
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the "mwifiex_pcie_alloc_cmdrsp_buf()" function in "drivers/net/wireless/marvell/mwifiex/pcie.c" file. A remote attacker on the local network can cause a denial of service condition (memory consumption) by triggering "mwifiex_map_pci_memory()" failures.


Affected software

Linux kernel
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Slackware Linux
Fedora
linux-4.4.217/kernel-generic
linux-4.4.217/kernel-huge
linux-4.4.217/kernel-modules
linux-4.4.217/kernel-headers
kernel (Red Hat package)
kernel

How to mitigate CVE-2019-19056

Install update from vendor's website.

Linux kernel - update to 5.3.12
linux-4.4.217/kernel-generic - update to 4.4.217
linux-4.4.217/kernel-huge - update to 4.4.217
linux-4.4.217/kernel-modules - update to 4.4.217
linux-4.4.217/kernel-headers - update to 4.4.217_smp
kernel (Red Hat package) - update to 4.18.0-240.el8
kernel - addressed in versions 5.3.12-200.fc30, 5.3.12-300.fc31

External References

Related Security Bulletins