Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 85.0 (excluding) |
| Firefox_esr | Mozilla | * | 78.7 (excluding) |
| Thunderbird | Mozilla | * | 78.7 (excluding) |
| Red Hat Enterprise Linux 7 | RedHat | firefox-0:78.7.0-2.el7_9 | * |
| Red Hat Enterprise Linux 7 | RedHat | thunderbird-0:78.7.0-1.el7_9 | * |
| Red Hat Enterprise Linux 8 | RedHat | firefox-0:78.7.0-2.el8_3 | * |
| Red Hat Enterprise Linux 8 | RedHat | thunderbird-0:78.7.0-1.el8_3 | * |
| Red Hat Enterprise Linux 8.1 Extended Update Support | RedHat | firefox-0:78.7.0-2.el8_1 | * |
| Red Hat Enterprise Linux 8.1 Extended Update Support | RedHat | thunderbird-0:78.7.0-1.el8_1 | * |
| Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | firefox-0:78.7.0-2.el8_2 | * |
| Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | thunderbird-0:78.7.0-1.el8_2 | * |
| Firefox | Ubuntu | bionic | * |
| Firefox | Ubuntu | devel | * |
| Firefox | Ubuntu | focal | * |
| Firefox | Ubuntu | groovy | * |
| Firefox | Ubuntu | hirsute | * |
| Firefox | Ubuntu | impish | * |
| Firefox | Ubuntu | jammy | * |
| Firefox | Ubuntu | kinetic | * |
| Firefox | Ubuntu | lunar | * |
| Firefox | Ubuntu | mantic | * |
| Firefox | Ubuntu | noble | * |
| Firefox | Ubuntu | trusty | * |
| Firefox | Ubuntu | upstream | * |
| Firefox | Ubuntu | xenial | * |
| Firefox-esr | Ubuntu | trusty | * |
| Firefox-esr | Ubuntu | upstream | * |
| Mozjs38 | Ubuntu | bionic | * |
| Mozjs38 | Ubuntu | esm-apps/bionic | * |
| Mozjs38 | Ubuntu | upstream | * |
| Mozjs52 | Ubuntu | bionic | * |
| Mozjs52 | Ubuntu | esm-apps/focal | * |
| Mozjs52 | Ubuntu | esm-infra/bionic | * |
| Mozjs52 | Ubuntu | focal | * |
| Mozjs52 | Ubuntu | groovy | * |
| Mozjs52 | Ubuntu | upstream | * |
| Mozjs60 | Ubuntu | upstream | * |
| Mozjs68 | Ubuntu | focal | * |
| Mozjs68 | Ubuntu | groovy | * |
| Mozjs68 | Ubuntu | upstream | * |
| Mozjs78 | Ubuntu | esm-apps/jammy | * |
| Mozjs78 | Ubuntu | groovy | * |
| Mozjs78 | Ubuntu | hirsute | * |
| Mozjs78 | Ubuntu | impish | * |
| Mozjs78 | Ubuntu | jammy | * |
| Mozjs78 | Ubuntu | kinetic | * |
| Mozjs78 | Ubuntu | lunar | * |
| Mozjs78 | Ubuntu | upstream | * |
| Thunderbird | Ubuntu | bionic | * |
| Thunderbird | Ubuntu | devel | * |
| Thunderbird | Ubuntu | focal | * |
| Thunderbird | Ubuntu | groovy | * |
| Thunderbird | Ubuntu | hirsute | * |
| Thunderbird | Ubuntu | impish | * |
| Thunderbird | Ubuntu | jammy | * |
| Thunderbird | Ubuntu | kinetic | * |
| Thunderbird | Ubuntu | lunar | * |
| Thunderbird | Ubuntu | mantic | * |
| Thunderbird | Ubuntu | noble | * |
| Thunderbird | Ubuntu | trusty | * |
| Thunderbird | Ubuntu | upstream | * |
| Thunderbird | Ubuntu | xenial | * |