Disclosure summary
Mozilla Firefox and Thunderbird contain a race condition vulnerability when running the nsDocShell destructor under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.
CISA remediation guidance
Apply updates per vendor instructions.
Original records & references
PUBLISHED 2021-11-03T00:00:00-04:00
MODIFIED 2021-11-03T00:00:00-04:00
INGESTED 2026-10-06T11:42:59-04:00