Description
Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 115.45 |
| Mozilla | Thunderbird | — | 153.7 |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr +1 | No fix yet | — |
| Debian 13 | firefox-esr | 153.7.0esr-1~deb13u1 | — |
| Debian 13 | thunderbird | 1:153.7.0esr-1~deb13u1 | — |
| Debian 12 | firefox-esr | 153.7.0esr-1~deb12u1 | — |
| Debian 12 | thunderbird | 1:153.7.0esr-1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +3 | No fix yet | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | firefox | 153.7.0-1.el10_3 | RHSA-2026:99572 |
| RHEL 9 | firefox +1 | 153.7.0-1.el9_9 | RHSA-2026:99111 |
| RHEL 8 | firefox | 153.7.0-1.el8_10 | RHSA-2026:99112 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.2 EUS | firefox | 153.7.0-1.el10_2 | RHSA-2026:99571 |
| RHEL 9.8 EUS | firefox +1 | 153.7.0-1.el9_8 | RHSA-2026:99110 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | firefox | 153.7.0-1.el8_10 | ALSA-2026:99112 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox +1 | 153.7.0-1.el9_9 | RLSA-2026:99111 |
| Rocky Linux 8 | firefox | 153.7.0-1.el8_10 | RLSA-2026:99112 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLES 15 SP6 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLES 15 SP5 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLES 15 SP4 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLES 12 SP5 | MozillaFirefox | 153.7.0-118.22.1 | SUSE-SU-2026:5174-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 153.7.0-150400.157.22.1 | SUSE-SU-2026:5229-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | firefox-esr | 153.7.0-1.1 | openSUSE-SU-2026:12527-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | firefox | 153.7.0-1.0.1.el8_10 | ELSA-2026-99112 |
Advisories 13
- SUSE-SU-2026:5229-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Nov 13, 2026
- RHSA-2026:99571 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99572 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99111 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99112 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99110 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RLSA-2026:99111 Important: firefox security update Rocky Linux Security Advisories · Nov 13, 2026
- ALSA-2026:99112 Important: firefox security update AlmaLinux Security Advisories · Nov 13, 2026
- RLSA-2026:99112 Important: firefox security update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-4515 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- openSUSE-SU-2026:12527-1 firefox-esr-153.7.0-1.1 on GA media SUSE / openSUSE Security Updates · Nov 12, 2026
- ELSA-2026-99112 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 12, 2026
- SUSE-SU-2026:5174-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Nov 11, 2026
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2081982
- https://www.mozilla.org/security/advisories/mfsa2026-125/
- https://www.mozilla.org/security/advisories/mfsa2026-126/
- https://www.mozilla.org/security/advisories/mfsa2026-127/
- https://www.mozilla.org/security/advisories/mfsa2026-128/
- https://www.mozilla.org/security/advisories/mfsa2026-129/