Use-after-free error in Linux kernel and linux_kernel (Debian package) - CVE-2016-7910

Vulnerability identifier: #VU6726

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2016-7910

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to use-after-free error in the disk_seqf_stop function in block/genhd.c. a local attacker can leverage the execution of a certain stop operation and execute arbitrary code on the system with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Linux kernel
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 Real Time for NFV
Red Hat Enterprise Linux for Real Time
CentOS
linux_kernel (Debian package)
kernel (Red Hat package)
kernel-rt (Red Hat package)

MRG Realtime

Update to 4.7.1.

kernel (Red Hat package) - addressed in versions 2.6.32-696.1.1.el6, 3.10.0-514.21.1.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-514.rt56.221.el6rt, 3.10.0-514.21.1.rt56.438.el7

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=77da160530dd1dc94f6ae1...

• Red Hat MRG Realtime update for kernel
• Red Hat Enterprise Linux for Real Time update for kernel
• Red Hat Linux update for kernel
• CentOS 7 update for kernel
• Red Hat Enterprise Linux 6 update for kernel