Arch Linux Security Advisory ASA-202105-5 ========================================= Severity: High Date : 2021-05-19 CVE-ID : CVE-2021-29952 Package : firefox Type : arbitrary code execution Remote : Yes Link : https://security.archlinux.org/AVG-1917 Summary ======= The package firefox before version 88.0.1-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 88.0.1-1. # pacman -Syu "firefox>=88.0.1-1" The problem has been fixed upstream in version 88.0.1. Workaround ========== None. Description =========== A security issue has been found in Firefox before version 88.0.1. When Web Render components were destructed, a race condition could have caused undefined behavior, and Mozilla presumes that with enough effort may have been exploitable to run arbitrary code. Impact ====== A remote attacker could execute arbitrary code through a crafted HTML page. References ========== https://www.mozilla.org/en-US/security/advisories/mfsa2021-20/#CVE-2021-2995... https://bugzilla.mozilla.org/show_bug.cgi?id=1704227 https://security.archlinux.org/CVE-2021-29952