Mozilla developers identified and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code. Mozilla developers Bob Clary, Henri Sivonen, Marco Bonardo, Mats Palmgren and Jesse Ruderman reported memory safety issues which affected Firefox 3.6 and Firefox 3.5
This is public via: http://www.mozilla.org/security/announce/2011/mfsa2011-12.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Via RHSA-2011:0473 https://rhn.redhat.com/errata/RHSA-2011-0473.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2011:0475 https://rhn.redhat.com/errata/RHSA-2011-0475.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Via RHSA-2011:0474 https://rhn.redhat.com/errata/RHSA-2011-0474.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 4 Via RHSA-2011:0471 https://rhn.redhat.com/errata/RHSA-2011-0471.html