# CVE-2023-3600: Use-after-free in workers

CVE-2023-3600 is fixed in 13 products on 2 platforms, first by Mozilla Firefox (en-US) 115.0.2, released July 12, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-3600
- Priority: High
- CVSS: 8.8 (Important)
- EPSS: 0.0063
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 12, 2023
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-3600

## Description

During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash. This vulnerability affects Firefox < 115.0.2, Firefox ESR < 115.0.2, and Thunderbird < 115.0.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox (en-US) | 115.0.2 | [Mozilla Firefox (en-US) 115.0.2](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-115.0.2.md) | Jul 12, 2023 |
| Windows apps | Mozilla Firefox ESR (en-US) | 115.4.0 | [Mozilla Firefox ESR (en-US) 115.4.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-115.4.0.md) | Oct 17, 2023 |
| Windows apps | Mozilla Thunderbird (en-US) | 115.8.0 | [Mozilla Thunderbird (en-US) 115.8.0](https://patchblox.com/security/data/fix/windows-app/mozilla.thunderbird-115.8.0.md) | Feb 21, 2024 |
| Linux | firefox RHEL 8 | 0:115.3.1-1.el8_8 | [RHSA-2023:5433](https://patchblox.com/security/data/fix/linux/rhsa-2023-5433.md) | Oct 4, 2023 |
| Linux | firefox RHEL 9 | 0:115.3.1-1.el9_2 | [RHSA-2023:5434](https://patchblox.com/security/data/fix/linux/rhsa-2023-5434.md) | Oct 4, 2023 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 115.0.2+build1-0ubuntu0.20.04.1 | [firefox 115.0.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-115.0.2-build1-0ubuntu0.20.04.1.md) | Jul 12, 2023 |
| Linux | firefox almalinux 9 | 115.3.1-1.el9_2.alma.1 | [ALSA-2023:5434](https://patchblox.com/security/data/fix/linux/alsa-2023-5434.md) | Oct 4, 2023 |
| Linux | firefox ol 8 | 0:115.3.1-1.0.1.el8_8 | [ELSA-2023-5433](https://patchblox.com/security/data/fix/linux/elsa-2023-5433.md) | Oct 6, 2023 |
| Linux | firefox ol 9 | 0:115.3.1-1.0.1.el9_2 | [ELSA-2023-5434](https://patchblox.com/security/data/fix/linux/elsa-2023-5434.md) | Oct 5, 2023 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 115.0.2+build1-0ubuntu0.20.04.1 | [firefox-geckodriver 115.0.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-115.0.2-build1-0ubuntu0.20.04.1.md) | Jul 12, 2023 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 115.0.2+build1-0ubuntu0.20.04.1 | [firefox-mozsymbols 115.0.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-115.0.2-build1-0ubuntu0.20.04.1.md) | Jul 12, 2023 |
| Linux | firefox-x11 RHEL 9 | 0:115.3.1-1.el9_2 | [RHSA-2023:5434](https://patchblox.com/security/data/fix/linux/rhsa-2023-5434.md) | Oct 4, 2023 |
| Linux | firefox-x11 almalinux 9 | 115.3.1-1.el9_2.alma.1 | [ALSA-2023:5434](https://patchblox.com/security/data/fix/linux/alsa-2023-5434.md) | Oct 4, 2023 |
| Linux | firefox-x11 ol 9 | 0:115.3.1-1.0.1.el9_2 | [ELSA-2023-5434](https://patchblox.com/security/data/fix/linux/elsa-2023-5434.md) | Oct 5, 2023 |
| Linux | thunderbird RHEL 8 | 0:115.3.1-1.el8_8 | [RHSA-2023:5428](https://patchblox.com/security/data/fix/linux/rhsa-2023-5428.md) | Oct 4, 2023 |
| Linux | thunderbird RHEL 9 | 0:115.3.1-1.el9_2 | [RHSA-2023:5435](https://patchblox.com/security/data/fix/linux/rhsa-2023-5435.md) | Oct 4, 2023 |
| Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:115.3.1+build1-0ubuntu0.20.04.1 | [thunderbird 1:115.3.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-115.3.1-build1-0ubuntu0.20.04.1.md) | Sep 28, 2023 |
| Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:115.3.1+build1-0ubuntu0.22.04.2 | [thunderbird 1:115.3.1+build1-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-115.3.1-build1-0ubuntu0.22.04.2.md) | Sep 28, 2023 |
| Linux | thunderbird almalinux 9 | 115.3.1-1.el9_2.alma | [ALSA-2023:5435](https://patchblox.com/security/data/fix/linux/alsa-2023-5435.md) | Oct 4, 2023 |
| Linux | thunderbird ol 8 | 0:115.3.1-1.0.1.el8_8 | [ELSA-2023-5428](https://patchblox.com/security/data/fix/linux/elsa-2023-5428.md) | Oct 6, 2023 |
| Linux | thunderbird ol 9 | 0:115.3.1-1.0.1.el9_2 | [ELSA-2023-5435](https://patchblox.com/security/data/fix/linux/elsa-2023-5435.md) | Oct 5, 2023 |
| Linux | thunderbird rocky 8 | 0:115.3.1-1.el8_8 | [RLSA-2023:5428](https://patchblox.com/security/data/fix/linux/rlsa-2023-5428.md) | Oct 5, 2023 |
| Linux | thunderbird rocky 9 | 0:115.3.1-1.el9_2 | [RLSA-2023:5435](https://patchblox.com/security/data/fix/linux/rlsa-2023-5435.md) | Oct 5, 2023 |
| Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:115.3.1+build1-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:115.3.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-115.3.1-build1-0ubuntu0.20.04.1.md) | Sep 28, 2023 |
| Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:115.3.1+build1-0ubuntu0.22.04.2 | [thunderbird-gnome-support 1:115.3.1+build1-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-115.3.1-build1-0ubuntu0.22.04.2.md) | Sep 28, 2023 |
| Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:115.3.1+build1-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:115.3.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-115.3.1-build1-0ubuntu0.20.04.1.md) | Sep 28, 2023 |
| Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:115.3.1+build1-0ubuntu0.22.04.2 | [thunderbird-mozsymbols 1:115.3.1+build1-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-115.3.1-build1-0ubuntu0.22.04.2.md) | Sep 28, 2023 |
| Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:115.3.1+build1-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:115.3.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-115.3.1-build1-0ubuntu0.20.04.1.md) | Sep 28, 2023 |
| Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:115.3.1+build1-0ubuntu0.22.04.2 | [xul-ext-calendar-timezones 1:115.3.1+build1-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-115.3.1-build1-0ubuntu0.22.04.2.md) | Sep 28, 2023 |
| Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:115.3.1+build1-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:115.3.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-115.3.1-build1-0ubuntu0.20.04.1.md) | Sep 28, 2023 |
| Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:115.3.1+build1-0ubuntu0.22.04.2 | [xul-ext-gdata-provider 1:115.3.1+build1-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-115.3.1-build1-0ubuntu0.22.04.2.md) | Sep 28, 2023 |
| Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:115.3.1+build1-0ubuntu0.20.04.1 | [xul-ext-lightning 1:115.3.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-115.3.1-build1-0ubuntu0.20.04.1.md) | Sep 28, 2023 |
| Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:115.3.1+build1-0ubuntu0.22.04.2 | [xul-ext-lightning 1:115.3.1+build1-0ubuntu0.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-115.3.1-build1-0ubuntu0.22.04.2.md) | Sep 28, 2023 |

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