arch/x86/kernel/entry_32.S in the Linux kernel through 3.15.1 on 32-bit x86 platforms, when syscall auditing is enabled and the sep CPU feature flag is set, allows local users to cause a denial of service (OOPS and system crash) via an invalid syscall number, as demonstrated by number 1000.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-4508
• https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.61
• http://article.gmane.org/gmane.linux.kernel/1726110
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
• http://openwall.com/lists/oss-security/2014/06/20/1
• http://secunia.com/advisories/58964
• http://secunia.com/advisories/60564
• http://www.openwall.com/lists/oss-security/2014/06/20/10
• http://www.openwall.com/lists/oss-security/2020/11/12/3
• http://www.securityfocus.com/bid/68126
• http://www.ubuntu.com/usn/USN-2334-1