CVE-2021-4127
firefox-esrVulnerabilityPatched
No public exploitation has been reported so far. A fixed version is available (see the table below).
Recommended action: Update to the fixed version listed for your distribution using the native package manager.
Affected & fixed versions by distribution
Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.
| Distribution | Package | Affected | Fixed version | Status |
|---|---|---|---|---|
| Debian:11 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:12 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:13 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:14 | firefox-esr | - | 78.9.0esr-1 | fixed |
| Debian:10 | firefox-esr | - | 78.9.0esr-1~deb10u1 | fixed |
| Debian:11 | thunderbird | - | 1:78.9.0-1 | fixed |
| Debian:12 | thunderbird | - | 1:78.9.0-1 | fixed |
| Debian:13 | thunderbird | - | 1:78.9.0-1 | fixed |
| Debian:14 | thunderbird | - | 1:78.9.0-1 | fixed |
| Debian:10 | thunderbird | - | 1:78.9.0-1~deb10u1 | fixed |
| Red Hat:rhel_eus:8.2::appstream | firefox | - | 0:78.9.0-1.el8_2 | fixed |
| Red Hat:enterprise_linux:8::appstream | firefox | - | 0:78.9.0-1.el8_3 | fixed |
| Red Hat:rhel_eus:8.1::appstream | firefox | - | 0:78.9.0-1.el8_1 | fixed |
| Red Hat:enterprise_linux:7::client | firefox | - | 0:78.9.0-1.el7_9 | fixed |
| Red Hat:enterprise_linux:7::server | firefox | - | 0:78.9.0-1.el7_9 | fixed |
| Red Hat:enterprise_linux:7::workstation | firefox | - | 0:78.9.0-1.el7_9 | fixed |
| Red Hat:enterprise_linux:8::appstream | thunderbird | - | 0:78.9.0-3.el8_3 | fixed |
| Red Hat:rhel_eus:8.2::appstream | thunderbird | - | 0:78.9.0-3.el8_2 | fixed |
| Red Hat:rhel_eus:8.1::appstream | thunderbird | - | 0:78.9.0-3.el8_1 | fixed |
| Red Hat:enterprise_linux:7::client | thunderbird | - | 0:78.9.0-3.el7_9 | fixed |
| Red Hat:enterprise_linux:7::server | thunderbird | - | 0:78.9.0-3.el7_9 | fixed |
| Red Hat:enterprise_linux:7::workstation | thunderbird | - | 0:78.9.0-3.el7_9 | fixed |