Description
Mozilla developers Christian Holler and Jason Kratzer reported memory safety bugs present in Firefox 95. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 96.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 96 | 96 |
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 22.04 LTS | firefox | 96.0+build2-0ubuntu1 | — |
| Ubuntu 20.04 LTS | firefox | 96.0+build2-0ubuntu0.20.04.1 | USN-5229-1 |
| Ubuntu 18.04 LTS | firefox | 96.0+build2-0ubuntu0.18.04.1 | USN-5229-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 96.0-1.1 | openSUSE-SU-2024:11732-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | librewolf | 97.0-r0 | — |
| Alpine v3.23 | firefox +1 | 97.0-r0 | — |
| Alpine v3.22 | firefox +1 | 97.0-r0 | — |
| Alpine v3.21 | firefox +1 | 97.0-r0 | — |
| Alpine v3.20 | firefox | 97.0-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | firefox | 97.0-r0 | — |
| Alpine v3.18 | firefox | 97.0-r0 | — |
| Alpine v3.17 | firefox | 97.0-r0 | — |
| Alpine v3.16 | firefox | 97.0-r0 | — |
Advisories 5
- USN-5229-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:11732-1 MozillaFirefox-96.0-1.1 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-2023-0839 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- WID-SEC-2022-0611 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 15, 2023