# CVE-2023-28177: Mozilla Firefox and 2 others: Out-of-bounds Write

CVE-2023-28177 is fixed in 5 products on 2 platforms, first by firefox 111.0+build2-0ubuntu0.18.04.1, released March 14, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-28177
- Priority: High
- CVSS: 8.8 (Medium)
- EPSS: 0.0055
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 14, 2023
- Weakness: CWE-787: Out-of-bounds Write
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-28177

## Description

Memory safety bugs present in Firefox 110. 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 < 111.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox (en-US) | 111.0 | [Mozilla Firefox (en-US) 111.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-111.0.md) | Mar 16, 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 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 111.0+build2-0ubuntu0.18.04.1 | [firefox 111.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-111.0-build2-0ubuntu0.18.04.1.md) | Mar 14, 2023 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 111.0+build2-0ubuntu0.20.04.1 | [firefox 111.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-111.0-build2-0ubuntu0.20.04.1.md) | Mar 14, 2023 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 111.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 111.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-111.0-build2-0ubuntu0.18.04.1.md) | Mar 14, 2023 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 111.0+build2-0ubuntu0.20.04.1 | [firefox-geckodriver 111.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-111.0-build2-0ubuntu0.20.04.1.md) | Mar 14, 2023 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 111.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 111.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-111.0-build2-0ubuntu0.18.04.1.md) | Mar 14, 2023 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 111.0+build2-0ubuntu0.20.04.1 | [firefox-mozsymbols 111.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-111.0-build2-0ubuntu0.20.04.1.md) | Mar 14, 2023 |

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Data as of 2026-11-09T01:18:40Z 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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