The Linux kernel before 3.15.4 on Intel processors does not properly restrict use of a non-canonical value for the saved RIP address in the case of a system call that does not use IRET, which allows local users to leverage a race condition and gain privileges, or cause a denial of service (double fault), via a crafted application that makes ptrace and fork system calls.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4699
Reference (s):
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b9cd18de4db3c9ffa7e17b0dc0ca99ed5aa4d43a
- http://linux.oracle.com/errata/ELSA-2014-0924.html
- http://linux.oracle.com/errata/ELSA-2014-3047.html
- http://linux.oracle.com/errata/ELSA-2014-3048.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.4