Resource exhaustion in Linux kernel - CVE-2019-3882

Vulnerability identifier: #VU18377

CSH Severity: Low

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-3882

CWE-ID: CWE-400

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform denial of service (DoS) attack.

The vulnerability exists within Linux kernel's vfio interface implementation, related to incorrect permission management. A local user with administrative privileges of the device, connected to vfio-pci interface can exhaust all system resources and perform denial of service attack.

Linux kernel
Red Hat Enterprise Linux for Real Time for NFV
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
Red Hat Enterprise Linux for Real Time
Fedora

kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel
kernel-headers
kernel-tools
Red Hat Virtualization Host

Install updates from vendor's website.

Linux kernel - addressed in versions 4.4.180, 4.9.173, 4.14.115, 4.19.38
kernel (Red Hat package) - update to 3.10.0-1062.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1062.rt56.1022.el7, 4.18.0-147.rt24.93.el8
kernel - addressed in versions 5.0.6-100.fc28, 5.0.6-200.fc29, 5.0.6-300.fc30
kernel-headers - addressed in versions 5.0.6-100.fc28, 5.0.6-200.fc29, 5.0.6-300.fc30
kernel-tools - addressed in versions 5.0.6-100.fc28, 5.0.6-200.fc29, 5.0.6-300.fc30

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.115
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.173
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.180
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.38

• Red Hat update for kernel-rt
• Red Hat update for kernel
• Red Hat Enterprise Linux 8 update for kernel-rt
• Fedora 30 update for kernel, kernel-headers, kernel-tools
• Fedora 29 update for kernel, kernel-headers, kernel-tools
• Fedora 28 update for kernel, kernel-headers, kernel-tools