# CVE-2022-26385: Mozilla Firefox ESR and 2 others: Use After Free

CVE-2022-26385 is fixed in 5 products on 2 platforms, first by Mozilla Firefox (en-US) 98.0, released March 8, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-26385
- Priority: Routine
- CVSS: 6.5 (Medium)
- EPSS: 0.0058
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 8, 2022
- Weakness: CWE-416: Use After Free
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-26385

## Description

In unusual circumstances, an individual thread may outlive the thread's manager during shutdown. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 98.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox (en-US) | 98.0 | [Mozilla Firefox (en-US) 98.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-98.0.md) | Mar 8, 2022 |
| Windows apps | Mozilla Firefox ESR (en-US) | 102.0 | [Mozilla Firefox ESR (en-US) 102.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-102.0.md) | Jun 23, 2022 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | [firefox 98.0+build3-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-98.0-build3-0ubuntu0.18.04.2.md) | Mar 8, 2022 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | [firefox 98.0+build3-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-98.0-build3-0ubuntu0.20.04.2.md) | Mar 8, 2022 |
| Linux | firefox Ubuntu 22.04.1 LTS (jammy) | 1:1snap1-0ubuntu1 | [firefox 1:1snap1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-firefox-1-1snap1-0ubuntu1.md) | Apr 6, 2022 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | [firefox-geckodriver 98.0+build3-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-98.0-build3-0ubuntu0.18.04.2.md) | Mar 8, 2022 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | [firefox-geckodriver 98.0+build3-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-98.0-build3-0ubuntu0.20.04.2.md) | Mar 8, 2022 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | [firefox-mozsymbols 98.0+build3-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-98.0-build3-0ubuntu0.18.04.2.md) | Mar 8, 2022 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | [firefox-mozsymbols 98.0+build3-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-98.0-build3-0ubuntu0.20.04.2.md) | Mar 8, 2022 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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