# RHSA-2023:0821: thunderbird security update

RHSA-2023:0821, released February 20, 2023, fixes 12 CVEs in thunderbird (version 0:102.8.0-2.el8_7). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2023-0821
- Platform: Linux
- Released: Feb 20, 2023
- Priority: High (Closes CVE-2023-25732, high severity)
- CVEs: 12, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2023:0821

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | RHEL 8 | 0:102.8.0-2.el8_7 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-25732](https://patchblox.com/security/data/cve/CVE-2023-25732.md) | High | Mozilla Firefox and 4 others: Out-of-bounds Write | 8.8 | 0.0074 |  |
| [CVE-2023-25735](https://patchblox.com/security/data/cve/CVE-2023-25735.md) | High | Mozilla Firefox and 4 others: Use After Free | 8.8 | 0.0072 |  |
| [CVE-2023-25737](https://patchblox.com/security/data/cve/CVE-2023-25737.md) | High | Mozilla Firefox and 4 others: Incorrect Type Conversion or Cast | 8.8 | 0.0070 |  |
| [CVE-2023-25739](https://patchblox.com/security/data/cve/CVE-2023-25739.md) | High | Mozilla Firefox and 4 others: Use After Free | 8.8 | 0.0068 |  |
| [CVE-2023-25729](https://patchblox.com/security/data/cve/CVE-2023-25729.md) | High | Mozilla Firefox and 4 others: Incorrect Authorization | 8.8 | 0.0068 |  |
| [CVE-2023-25744](https://patchblox.com/security/data/cve/CVE-2023-25744.md) | High | Mozilla Firefox and 2 others: Mmemory safety bugs present in Firefox 109 and Firefox ESR 102.7. | 8.8 | 0.0067 |  |
| [CVE-2023-25728](https://patchblox.com/security/data/cve/CVE-2023-25728.md) | High | Mozilla Firefox and 4 others: Observable Discrepancy | 7.5 | 0.0067 |  |
| [CVE-2023-25746](https://patchblox.com/security/data/cve/CVE-2023-25746.md) | High | Mozilla Thunderbird and 1 other: Out-of-bounds Write | 8.8 | 0.0067 |  |
| [CVE-2023-25743](https://patchblox.com/security/data/cve/CVE-2023-25743.md) | High | Mozilla Firefox and 2 others: A lack of in app notification for entering fullscreen mode could have lead to a malicious website spoofing… | 7.5 | 0.0065 |  |
| [CVE-2023-25742](https://patchblox.com/security/data/cve/CVE-2023-25742.md) | High | Mozilla Firefox and 4 others: When importing a SPKI RSA public key as ECDSA P-256, the key would be handled incorrectly causing the… | 7.5 | 0.0065 |  |
| [CVE-2023-25730](https://patchblox.com/security/data/cve/CVE-2023-25730.md) | High | Mozilla Firefox and 4 others: Improper Restriction of Rendered UI Layers or Frames | 7.5 | 0.0055 |  |
| [CVE-2023-0616](https://patchblox.com/security/data/cve/CVE-2023-0616.md) | High | Mozilla Thunderbird and 1 other: Allocation of Resources Without Limits or Throttling | 7.5 | 0.0049 |  |

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Data as of 2026-11-07T18:46:35Z 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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