# RHSA-2023:5224: thunderbird security update

RHSA-2023:5224, released September 19, 2023, fixes 2 CVEs in thunderbird (version 0:102.15.1-1.el9_2). One of them is being exploited (CVE-2023-4863); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2023-5224
- Platform: Linux
- Released: Sep 19, 2023
- Priority: Patch now (Closes CVE-2023-4863, exploited (CISA KEV))
- CVEs: 2, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://access.redhat.com/errata/RHSA-2023:5224

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | RHEL 9 | 0:102.15.1-1.el9_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-4863](https://patchblox.com/security/data/cve/CVE-2023-4863.md) | Patch now | Chromium: CVE-2023-4863 Heap buffer overflow in WebP | 9.6 | 0.9998 | CISA KEV, Disclosed |
| [CVE-2023-5129](https://patchblox.com/security/data/cve/CVE-2023-5129.md) | High | firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.  This... | 9.6 | n/a |  |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo