Description
Improper refcounting of soft token session objects could cause a use-after-free and crash (likely limited to a denial of service). This vulnerability affects Firefox < 71.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | before 71 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | firefox | 71.0+build5-0ubuntu1 | — |
| Ubuntu 20.04 LTS | mozjs52 | No fix yet | — |
| Ubuntu 18.04 LTS | firefox | 71.0+build5-0ubuntu0.18.04.1 | USN-4216-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
| Ubuntu 16.04 LTS | firefox | 71.0+build5-0ubuntu0.16.04.1 | USN-4216-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | nspr +1 | 4.25.0-2.el8_2 | RHSA-2020:3280 |
| RHEL 8 | nss +9 | 3.53.1-11.el8_2 | RHSA-2020:3280 |
| RHEL 7 | nspr +1 | 4.25.0-2.el7_9 | RHSA-2020:4076 |
| RHEL 7 | nss +4 | 3.53.1-3.el7_9 | RHSA-2020:4076 |
| RHEL 7 | nss-softokn +3 | 3.53.1-6.el7_9 | RHSA-2020:4076 |
| RHEL 7 | nss-util +1 | 3.53.1-1.el7_9 | RHSA-2020:4076 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.7 EUS | nss-softokn +3 | 3.44.0-9.el7_7 | RHSA-2021:1026 |
| RHEL 7.6 EUS | nss +4 | 3.36.0-9.el7_6 | RHSA-2021:0876 |
| RHEL 7.6 EUS | nss-softokn +3 | 3.36.0-7.el7_6 | RHSA-2021:0876 |
| RHEL 7.4 TUS | nss-softokn +3 | 3.28.3-10.el7_4 | RHSA-2021:0758 |
| RHEL 7.4 E4S | nss-softokn +3 | 3.28.3-10.el7_4 | RHSA-2021:0758 |
| RHEL 7.4 AUS | nss-softokn +3 | 3.28.3-10.el7_4 | RHSA-2021:0758 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | nspr | 4.25.0-2.el8_2 | RLSA-2020:3280 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 92.0-1.2 | openSUSE-SU-2024:10600-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nspr +1 | 4.25.0-2.amzn2 | ALAS2-2020-1559 |
| Amazon Linux 2 | nss +4 | 3.53.1-3.amzn2 | ALAS2-2020-1559 |
| Amazon Linux 2 | nss-softokn +3 | 3.53.1-6.amzn2 | ALAS2-2020-1559 |
| Amazon Linux 2 | nss-util +1 | 3.53.1-1.amzn2 | ALAS2-2020-1559 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | nspr +1 | 4.25.0-2.el8_2 | ELSA-2020-3280 |
| Oracle Linux 8 | nss +9 | 3.53.1-11.el8_2 | ELSA-2020-3280 |
| Oracle Linux 7 | nspr +1 | 4.25.0-2.el7_9 | ELSA-2020-4076 |
| Oracle Linux 7 | nss +4 | 3.53.1-3.el7_9 | ELSA-2020-4076 |
| Oracle Linux 7 | nss-softokn +3 | 3.53.1-6.0.1.el7_9 | ELSA-2020-4076 |
| Oracle Linux 7 | nss-util +1 | 3.53.1-1.el7_9 | ELSA-2020-4076 |
Advisories 15
- RHSA-2020:4076 Red Hat Security Advisory: nss and nspr security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 20, 2026
- RHSA-2021:1026 Red Hat Security Advisory: nss-softokn security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2021:0876 Red Hat Security Advisory: nss and nss-softokn security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2021:0758 Red Hat Security Advisory: nss-softokn security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2020:3280 Red Hat Security Advisory: nss and nspr security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-4216-2 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4216-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- RLSA-2020:3280 Moderate: nss and nspr security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:10600-1 MozillaFirefox-92.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-1591 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2024
- WID-SEC-2022-1826 Mozilla Firefox: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 19, 2024
- ALAS2-2020-1559 Moderate: nspr security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 11, 2020
- ELSA-2020-4076 Moderate: nss and nspr security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 8, 2020
- ELSA-2020-3280 Moderate: nss and nspr security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 4, 2020