HIGH
gcc 4.3.x does not generate a cld instruction while compiling functions used for string manipulation such as memcpy and memmove on x86 and i386, which can prevent the direction flag (DF) from being reset in violation of ABI conventions and cause data to be copied in the wrong direction during signal handling in the Linux kernel, which might allow context-dependent attackers to trigger memory corruption. NOTE: this issue was originally reported for CPU consumption in SBCL.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=469058
http://gcc.gnu.org/ml/gcc-patches/2008-03/msg00417.html
http://gcc.gnu.org/ml/gcc-patches/2008-03/msg00428.html
http://gcc.gnu.org/ml/gcc-patches/2008-03/msg00432.html
http://gcc.gnu.org/ml/gcc-patches/2008-03/msg00499.html
http://lists.opensuse.org/opensuse-security-announce/2008-06/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00002.html
http://lists.vmware.com/pipermail/security-announce/2008/000023.html
http://lkml.org/lkml/2008/3/5/207
http://lwn.net/Articles/272048/#Comments
http://marc.info/?l=git-commits-head&m=120492000901739&w=2
http://rhn.redhat.com/errata/RHSA-2008-0508.html
http://secunia.com/advisories/30110
http://secunia.com/advisories/30116
http://secunia.com/advisories/30818
http://secunia.com/advisories/30850
http://secunia.com/advisories/30890
http://secunia.com/advisories/30962
http://secunia.com/advisories/31246
http://www.redhat.com/support/errata/RHSA-2008-0211.html
http://www.redhat.com/support/errata/RHSA-2008-0233.html
http://www.securityfocus.com/bid/29084
http://www.vupen.com/english/advisories/2008/2222/references
https://bugzilla.redhat.com/show_bug.cgi?id=437312
https://exchange.xforce.ibmcloud.com/vulnerabilities/41340
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11108