Use-after-free in Linux kernel - CVE-2017-0861

Vulnerability identifier: #VU9961

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-2017-0861

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to a use-after-free error in snd_pcm_info() function in the ALSA subsystem.  A local user can perform a denial of service attack.

Linux kernel
Debian Linux
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 for Scientific Computing
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
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
SUSE Linux
Ubuntu

kernel (Red Hat package)

Update to version 4.14.6, 4.9.69 or 4.4.106.

kernel (Red Hat package) - addressed in versions 2.6.32-754.3.5.el6, 3.10.0-862.46.1.el7

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.6
• http://www.openwall.com/lists/oss-security/2017/12/04/2
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.69
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.106

• Ubuntu update for Linux kernel
• Ubuntu update for Linux kernel (Trusty HWE)
• SUSE Linux update for the Linux Kernel
• Debian update for linux
• SUSE Linux update for the Linux Kernel
• SUSE Linux update for the Linux Kernel
• SUSE Linux update for the Linux Kernel
• SUSE Linux update for the Linux Kernel
• SUSE Linux update for the Linux Kernel
• Red Hat update for kernel
• Red Hat Enterprise Linux 6 update for kernel