Information exposure in Linux kernel - CVE-2016-9756
Published: December 28, 2016 / Updated: January 7, 2017
Vulnerability identifier: #VU92444
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-9756
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to information exposure error within the em_iret(), em_jmp_far() and em_ret_far() functions in arch/x86/kvm/emulate.c. A local user can gain access to sensitive information.
Affected software
Linux kernel
Fedora
kernel
Fedora
kernel
How to mitigate CVE-2016-9756
Install update from vendor's repository.
kernel - addressed in versions 4.8.12-100.fc23, 4.8.12-200.fc24, 4.8.12-300.fc25
External References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2117d5398c81554fbf803f5fd1dc55eb78216c0c
- http://lists.opensuse.org/opensuse-security-announce/2017-01/msg00000.html
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12
- http://www.openwall.com/lists/oss-security/2016/12/01/1
- http://www.securityfocus.com/bid/94615
- https://bugzilla.redhat.com/show_bug.cgi?id=1400468
- https://github.com/torvalds/linux/commit/2117d5398c81554fbf803f5fd1dc55eb78216c0c