Description
If Windows failed to duplicate a handle during process creation, the sandbox code may have inadvertently freed a pointer twice, resulting in a use-after-free and a potentially exploitable crash.
*This bug only affects Firefox on Windows when run in non-standard configurations (such as using `runas`). Other operating systems are unaffected.* This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 118 | 118 |
| Mozilla | Firefox ESR | unspecified – < 115.3 | 115.3 |
| Mozilla | Thunderbird | unspecified – < 115.3 | 115.3 |
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 24.04 LTS | mozjs102 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | 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 15 SP5 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.3.1-150200.8.133.1 | SUSE-SU-2023:4016-1 |
| SLES 15 SP4 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLES 15 SP4 | MozillaThunderbird | 115.3.1-150200.8.133.1 | SUSE-SU-2023:4016-1 |
| SLES 15 SP3 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLES 15 SP2 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLES 15 SP1 | MozillaFirefox | 115.3.0-150000.150.107.1 | SUSE-SU-2023:3899-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.3.0-112.182.1 | SUSE-SU-2023:3837-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 115.3.0-150000.150.107.1 | SUSE-SU-2023:3899-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.3.0-112.182.1 | SUSE-SU-2023:3837-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 115.3.0-150000.150.107.1 | SUSE-SU-2023:3899-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 118.0.1-1.1 | openSUSE-SU-2024:13272-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 115.3.0-1.1 | openSUSE-SU-2024:13268-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.3.1-150200.8.133.1 | SUSE-SU-2023:4016-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 115.3.0-150200.152.108.1 | SUSE-SU-2023:3898-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 115.3.1-150200.8.133.1 | SUSE-SU-2023:4016-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 115.3.0-r0 | — |
| Alpine v3.22 | firefox-esr | 115.3.0-r0 | — |
| Alpine v3.21 | firefox-esr | 115.3.0-r0 | — |
| Alpine v3.20 | firefox-esr | 115.3.0-r0 | — |
| Alpine v3.19 | firefox-esr | 115.3.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 115.3.0-r0 | — |
Advisories 8
- SUSE-SU-2023:4016-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3899-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3898-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13268-1 MozillaThunderbird-115.3.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13272-1 MozillaFirefox-118.0.1-1.1 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
- SUSE-SU-2023:3837-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-2448 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 15, 2024