Buffer overflow in Linux kernel - CVE-2019-3846

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Main Vulnerability Database Vulnerabilities #VU28399

Buffer overflow in Linux kernel - CVE-2019-3846

Published: June 3, 2019 / Updated: June 1, 2020


Vulnerability identifier: #VU28399
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-3846
CWE-ID: CWE-119
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the mwifiex kernel module while connecting to a malicious wireless network.


Affected software

Linux kernel
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Virtualization Host - Extended Update Support 4.2 for RHEL
Slackware Linux
Ubuntu
Fedora
Red Hat Virtualization Host
linux-kvm (Ubuntu package)
linux-snapdragon (Ubuntu package)
linux-hwe (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux (Ubuntu package)
linux-raspi2 (Ubuntu package)
linux-oem (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gke-4.15 (Ubuntu package)
linux-aws (Ubuntu package)
kpatch-patch-3_10_0-1062_1_2 (Red Hat package)
kpatch-patch-3_10_0-1062_1_1 (Red Hat package)
kpatch-patch-3_10_0-1062 (Red Hat package)
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-alt (Red Hat package)
kernel-headers
kernel-tools
kernel
linux-4.4.186/kernel-modules
linux-4.4.186/kernel-huge
linux-4.4.186/kernel-generic
linux-4.4.186/kernel-headers

How to mitigate CVE-2019-3846

Install update from vendor's website.

Linux kernel - addressed in versions 4.4.186, 4.9.186, 4.14.134, 4.19.59, 5.1.18, 5.2
linux-kvm (Ubuntu package) - addressed in versions 4.15.0-1042.42, 5.0.0-1013.14
linux-snapdragon (Ubuntu package) - addressed in versions 4.15.0-1060.66, 5.0.0-1018.19
linux-hwe (Ubuntu package) - addressed in versions 4.15.0-58.64~16.04.1, 5.0.0-25.26~18.04.1
linux-gcp (Ubuntu package) - addressed in versions 4.15.0-1040.42~16.04.1, 4.15.0-1040.42, 5.0.0-1013.13
linux-azure (Ubuntu package) - addressed in versions 4.15.0-1055.60, 5.0.0-1014.14~18.04.1, 5.0.0-1014.14
linux (Ubuntu package) - addressed in versions 4.15.0-58.64, 5.0.0-25.26
linux-raspi2 (Ubuntu package) - addressed in versions 4.15.0-1043.46, 5.0.0-1014.14
linux-oem (Ubuntu package) - update to 4.15.0-1050.57
linux-oracle (Ubuntu package) - addressed in versions 4.15.0-1021.23~16.04.1, 4.15.0-1021.23
linux-gke-4.15 (Ubuntu package) - update to 4.15.0-1040.42
linux-aws (Ubuntu package) - update to 5.0.0-1014.16
kpatch-patch-3_10_0-1062_1_2 (Red Hat package) - update to 1-3.el7
kpatch-patch-3_10_0-1062_1_1 (Red Hat package) - update to 1-4.el7
kpatch-patch-3_10_0-1062 (Red Hat package) - update to 1-5.el7
kernel (Red Hat package) - addressed in versions 3.10.0-957.54.1.el7, 3.10.0-1062.4.1.el7
kernel-rt (Red Hat package) - update to 3.10.0-1062.4.1.rt56.1027.el7
kernel-alt (Red Hat package) - update to 4.14.0-115.17.1.el7a
kernel-headers - addressed in versions 5.1.6-200.fc29, 5.1.7-300.fc30
kernel-tools - update to 5.1.6-200.fc29
kernel - addressed in versions 5.1.6-200.fc29, 5.1.7-300.fc30
linux-4.4.186/kernel-modules - update to 4.4.186
linux-4.4.186/kernel-huge - update to 4.4.186
linux-4.4.186/kernel-generic - update to 4.4.186
linux-4.4.186/kernel-headers - update to 4.4.186_smp

External References

Related Security Bulletins