CVE-2009-2910 Information

Description

arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.31.4 on the x86_64 platform does not clear certain kernel registers before a return to user mode which allows local users to read register values from an earlier process by switching an ia32 process to 64-bit mode.

Reference

http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git;a=commit;h=24e35800cdc4350fc34e2bed37b608a9e13ab3b6 http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00007.html http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html http://lkml.org/lkml/2009/10/1/164 http://marc.info/?l=oss-security&m=125442304214452&w=2 http://marc.info/?l=oss-security&m=125444390112831&w=2 http://marc.info/?l=oss-security&m=125511635004768&w=2 http://secunia.com/advisories/36927 http://secunia.com/advisories/37075 http://secunia.com/advisories/37351 http://support.avaya.com/css/P8/documents/100073666 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.4 http://www.openwall.com/lists/oss-security/2009/10/02/1 http://www.redhat.com/support/errata/RHSA-2009-1671.html http://www.securityfocus.com/bid/36576 http://www.ubuntu.com/usn/usn-864-1 https://bugzilla.redhat.com/show_bug.cgi?id=526788 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A10823 https://oval.cisecurity.org/repository/search/definition/oval3Aorg.mitre.oval3Adef3A7359 https://rhn.redhat.com/errata/RHSA-2009-1540.html https://rhn.redhat.com/errata/RHSA-2010-0046.html https://rhn.redhat.com/errata/RHSA-2010-0095.html https://www.redhat.com/archives/fedora-package-announce/2009-October/msg00483.html