Race condition in the ion_ioctl function in drivers/staging/android/ion/ion.c in the Linux kernel before 4.6 allows local users to gain privileges or cause a denial of service (use-after-free) by calling ION_IOC_FREE on two CPUs at the same time.
https://github.com/torvalds/linux/commit/9590232bb4f4cc824f3425a6e1349afbe6d6d2b7
http://www.securityfocus.com/bid/94669
http://source.android.com/security/bulletin/2016-12-01.html
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9590232bb4f4cc824f3425a6e1349afbe6d6d2b7
Source: Mitre, NVD
Published: 2016-12-08
Updated: 2025-04-12
Base Score: 9.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C
Severity: High
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS: 0.00276