Description
Use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 159, Thunderbird 159, Firefox ESR 153.7, and Thunderbird 153.7.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 153.7 |
| 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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 153.7.0-118.22.1 | SUSE-SU-2026:5174-1 |
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 4
- 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
- WID-SEC-2026-4216 Mozilla Firefox, Firefox ESR, und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- SUSE-SU-2026:5174-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Nov 11, 2026