Mozilla developers and community members identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes 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. Vladimir Vukicevic, Jesse Ruderman, Martijn Wargers, Daniel Banchero, David Keeler, and Boris Zbarsky reported crashes in the browser engine which affected both Firefox 3 and Firefox 3.5.
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Via RHSA-2009:1530 https://rhn.redhat.com/errata/RHSA-2009-1530.html
This issue has been addressed in following products: Red Hat Enterprise Linux 3 Red Hat Enterprise Linux 4 Via RHSA-2009:1531 https://rhn.redhat.com/errata/RHSA-2009-1531.html
blam-1.8.5-15.fc11, chmsee-1.0.1-12.fc11, epiphany-2.26.3-5.fc11, epiphany-extensions-2.26.1-7.fc11, evolution-rss-0.1.4-5.fc11, firefox-3.5.4-1.fc11, galeon-2.0.7-17.fc11, gnome-python2-extras-2.25.3-8.fc11, gnome-web-photo-0.7-7.fc11, google-gadgets-0.11.1-2.fc11, hulahop-0.4.9-9.fc11, kazehakase-0.5.8-2.fc11.1, Miro-2.5.2-5.fc11, monodevelop-2.0-6.fc11, mozvoikko-0.9.7-0.8.rc1.fc11, pcmanx-gtk2-0.3.8-9.fc11, ruby-gnome2-0.19.3-3.fc11, seahorse-plugins-2.26.2-7.fc11, xulrunner-1.9.1.4-1.fc11, yelp-2.26.0-8.fc11, eclipse-3.4.2-17.fc11, perl-Gtk2-MozEmbed-0.08-6.fc11.6 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.
As comments say Fedora 11 and RHEL {3,4,5} (and CentOS too) had the issue addresed. OTOH firefox-3.0.15-1.fc10, together with xulrunner, epiphany, yelp, etc..., were build in koji a week ago but corresponding security updates for Fedora 10 so far did not show up.
F10 updates are in pending state: https://admin.fedoraproject.org/updates/firefox
blam-1.8.5-15.fc10, epiphany-2.24.3-11.fc10, epiphany-extensions-2.24.3-6.fc10, evolution-rss-0.1.4-5.fc10, firefox-3.0.15-1.fc10, galeon-2.0.7-15.fc10, gecko-sharp2-0.13-13.fc10, gnome-python2-extras-2.19.1-35.fc10, gnome-web-photo-0.3-23.fc10, google-gadgets-0.10.5-11.fc10, kazehakase-0.5.6-4.fc10.7, Miro-2.0.5-5.fc10, mozvoikko-0.9.5-15.fc10, mugshot-1.2.2-14.fc10, pcmanx-gtk2-0.3.8-14.fc10, perl-Gtk2-MozEmbed-0.08-6.fc10.6, ruby-gnome2-0.19.3-3.fc10, xulrunner-1.9.0.15-1.fc10, yelp-2.24.0-14.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2010:0153 https://rhn.redhat.com/errata/RHSA-2010-0153.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Via RHSA-2010:0154 https://rhn.redhat.com/errata/RHSA-2010-0154.html