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Test your applicationsUpgrade Debian:unstable firefox to version 116.0-1 or higher.
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Memory safety bugs present in Firefox 115, Firefox ESR 115.0, and Thunderbird 115.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 116, Firefox ESR < 115.1, and Thunderbird < 115.1.