# CVE-2022-46879: Mozilla Firefox and 2 others: Out-of-bounds Write

CVE-2022-46879 is fixed in 5 products on 2 platforms, first by firefox 108.0+build2-0ubuntu0.18.04.1, released December 13, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-46879
- Priority: High
- CVSS: 8.8 (Medium)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 13, 2022
- Weakness: CWE-787: Out-of-bounds Write
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-46879

## Description

Mozilla developers and community members Lukas Bernhard, Gabriele Svelto, Randell Jesup, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 107. 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 < 108.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox (en-US) | 108.0 | [Mozilla Firefox (en-US) 108.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-108.0.md) | Dec 14, 2022 |
| 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 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 108.0+build2-0ubuntu0.18.04.1 | [firefox 108.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-108.0-build2-0ubuntu0.18.04.1.md) | Dec 13, 2022 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 108.0+build2-0ubuntu0.20.04.1 | [firefox 108.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-108.0-build2-0ubuntu0.20.04.1.md) | Dec 13, 2022 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 108.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 108.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-108.0-build2-0ubuntu0.18.04.1.md) | Dec 13, 2022 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 108.0+build2-0ubuntu0.20.04.1 | [firefox-geckodriver 108.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-108.0-build2-0ubuntu0.20.04.1.md) | Dec 13, 2022 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 108.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 108.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-108.0-build2-0ubuntu0.18.04.1.md) | Dec 13, 2022 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 108.0+build2-0ubuntu0.20.04.1 | [firefox-mozsymbols 108.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-108.0-build2-0ubuntu0.20.04.1.md) | Dec 13, 2022 |

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Data as of 2026-11-08T06:59:42Z 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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