Integer overflow in Linux kernel - CVE-2016-9084
Published: November 28, 2016 / Updated: January 5, 2018
Vulnerability identifier: #VU91183
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-2016-9084
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer overflow within the vfio_msi_enable() function in drivers/vfio/pci/vfio_pci_intrs.c, within the vfio_pci_ioctl() function in drivers/vfio/pci/vfio_pci.c. A local user can execute arbitrary code.
Affected software
Linux kernel
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Fedora
kernel-rt (Red Hat package)
kernel
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Fedora
kernel-rt (Red Hat package)
kernel
How to mitigate CVE-2016-9084
Install update from vendor's website.
kernel-rt (Red Hat package) - update to 3.10.0-514.10.2.rt56.435.el7
kernel - addressed in versions 4.8.5-300.fc25, 4.8.6-201.fc24, 4.8.7-100.fc23, 4.8.8-100.fc23
kernel - addressed in versions 4.8.5-300.fc25, 4.8.6-201.fc24, 4.8.7-100.fc23, 4.8.8-100.fc23
External References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=05692d7005a364add85c6e25a6c4447ce08f913a
- http://rhn.redhat.com/errata/RHSA-2017-0386.html
- http://rhn.redhat.com/errata/RHSA-2017-0387.html
- http://www.openwall.com/lists/oss-security/2016/10/26/11
- http://www.securityfocus.com/bid/93930
- https://bugzilla.redhat.com/show_bug.cgi?id=1389259
- https://github.com/torvalds/linux/commit/05692d7005a364add85c6e25a6c4447ce08f913a
- https://patchwork.kernel.org/patch/9373631/