Input validation error in Linux kernel - CVE-2016-8650

Vulnerability identifier: #VU28376

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2016-8650

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The mpi_powm function in lib/mpi/mpi-pow.c in the Linux kernel through 4.8.11 does not ensure that memory is allocated for limb data, which allows local users to cause a denial of service (stack memory corruption and panic) via an add_key system call for an RSA key with a zero exponent.

Linux kernel
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Server for ARM
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - Extended Update Support
Fedora
MRG Realtime
Red Hat Virtualization Host
kernel-rt (Red Hat package)
kernel (Red Hat package)
kernel

Install update from vendor's website.

Linux kernel - update to 4.8.12
kernel-rt (Red Hat package) - addressed in versions 3.10.0-514.rt56.219.el6rt, 3.10.0-514.16.1.rt56.437.el7
kernel (Red Hat package) - update to 3.10.0-514.16.1.el7
kernel - addressed in versions 4.8.11-100.fc23, 4.8.11-200.fc24, 4.8.11-300.fc25

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12

• Input validation error in Linux kernel
• Fedora 25 update for kernel
• Fedora 24 update for kernel
• Fedora 23 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise MRG 2 update for kernel-rt
• Red Hat Enterprise Linux 7 update for kernel-rt