# CVE-2023-5129: firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.  This...

CVE-2023-5129 is fixed in 6 products on 1 platform, first by RHSA-2023:5184, released September 18, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-5129
- Priority: High
- CVSS: 9.6 (Important)
- EPSS: n/a
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2023

## Description

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.  This update upgrades Firefox to version 102.15.1 ESR.  Security Fix(es):  * libwebp: Heap buffer overflow in WebP Codec (CVE-2023-4863)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firefox RHEL 8 | 0:102.15.1-1.el8_8 | [RHSA-2023:5184](https://patchblox.com/security/data/fix/linux/rhsa-2023-5184.md) | Sep 18, 2023 |
| Linux | firefox RHEL 9 | 0:102.15.1-1.el9_2 | [RHSA-2023:5200](https://patchblox.com/security/data/fix/linux/rhsa-2023-5200.md) | Sep 18, 2023 |
| Linux | firefox-x11 RHEL 9 | 0:102.15.1-1.el9_2 | [RHSA-2023:5200](https://patchblox.com/security/data/fix/linux/rhsa-2023-5200.md) | Sep 18, 2023 |
| Linux | libwebp RHEL 8 | 0:1.0.0-8.el8_8.1 | [RHSA-2023:5309](https://patchblox.com/security/data/fix/linux/rhsa-2023-5309.md) | Sep 20, 2023 |
| Linux | libwebp RHEL 9 | 0:1.2.0-7.el9_2 | [RHSA-2023:5214](https://patchblox.com/security/data/fix/linux/rhsa-2023-5214.md) | Sep 19, 2023 |
| Linux | libwebp rocky 9 | 0:1.2.0-7.el9_2 | [RLSA-2023:5214](https://patchblox.com/security/data/fix/linux/rlsa-2023-5214.md) | Oct 6, 2023 |
| Linux | libwebp-devel RHEL 8 | 0:1.0.0-8.el8_8.1 | [RHSA-2023:5309](https://patchblox.com/security/data/fix/linux/rhsa-2023-5309.md) | Sep 20, 2023 |
| Linux | libwebp-devel RHEL 9 | 0:1.2.0-7.el9_2 | [RHSA-2023:5214](https://patchblox.com/security/data/fix/linux/rhsa-2023-5214.md) | Sep 19, 2023 |
| Linux | libwebp-tools RHEL 9 | 0:1.2.0-7.el9_2 | [RHSA-2023:5214](https://patchblox.com/security/data/fix/linux/rhsa-2023-5214.md) | Sep 19, 2023 |
| Linux | thunderbird RHEL 8 | 0:102.15.1-1.el8_8 | [RHSA-2023:5201](https://patchblox.com/security/data/fix/linux/rhsa-2023-5201.md) | Sep 18, 2023 |
| Linux | thunderbird RHEL 9 | 0:102.15.1-1.el9_2 | [RHSA-2023:5224](https://patchblox.com/security/data/fix/linux/rhsa-2023-5224.md) | Sep 19, 2023 |
| Linux | thunderbird rocky 8 | 0:102.15.1-1.el8_8 | [RLSA-2023:5201](https://patchblox.com/security/data/fix/linux/rlsa-2023-5201.md) | Oct 6, 2023 |

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Data as of 2026-11-08T00:53:09Z 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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