CVE-2014-9419 Information

Description

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel through 3.18.1 does not ensure that Thread Local Storage (TLS) descriptors are loaded before proceeding with other steps which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application that reads a TLS base address.

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f647d7c155f069c1a068030255c300663516420e http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147864.html http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147973.html http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00020.html http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html http://rhn.redhat.com/errata/RHSA-2015-1081.html http://www.debian.org/security/2015/dsa-3128 http://www.mandriva.com/security/advisories?name=MDVSA-2015:058 http://www.openwall.com/lists/oss-security/2014/12/25/1 http://www.securityfocus.com/bid/71794 http://www.ubuntu.com/usn/USN-2515-1 http://www.ubuntu.com/usn/USN-2516-1 http://www.ubuntu.com/usn/USN-2517-1 http://www.ubuntu.com/usn/USN-2518-1 http://www.ubuntu.com/usn/USN-2541-1 http://www.ubuntu.com/usn/USN-2542-1 https://bugzilla.redhat.com/show_bug.cgi?id=1177260 https://github.com/torvalds/linux/commit/f647d7c155f069c1a068030255c300663516420e