# RHSA-2022:4892: thunderbird security update

RHSA-2022:4892, released June 3, 2022, fixes 8 CVEs in thunderbird (version 0:91.10.0-1.el9_0). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2022-4892
- Platform: Linux
- Released: Jun 3, 2022
- Priority: High (Closes CVE-2022-31736, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2022:4892

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | RHEL 9 | 0:91.10.0-1.el9_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-31736](https://patchblox.com/security/data/cve/CVE-2022-31736.md) | High | Mozilla Thunderbird and 4 others: Permissive Cross-domain Policy with Untrusted Domains | 9.8 | 0.0111 |  |
| [CVE-2022-31747](https://patchblox.com/security/data/cve/CVE-2022-31747.md) | High | Mozilla Thunderbird and 4 others: Improper Restriction of Operations within the Bounds of a Memory Buffer | 9.8 | 0.0094 |  |
| [CVE-2022-31737](https://patchblox.com/security/data/cve/CVE-2022-31737.md) | High | Mozilla Thunderbird and 4 others: Out-of-bounds Write | 9.8 | 0.0087 |  |
| [CVE-2022-31741](https://patchblox.com/security/data/cve/CVE-2022-31741.md) | High | Mozilla Thunderbird and 4 others: Use of Uninitialized Resource | 9.8 | 0.0071 |  |
| [CVE-2022-31740](https://patchblox.com/security/data/cve/CVE-2022-31740.md) | High | Mozilla Thunderbird and 4 others: Improper Restriction of Operations within the Bounds of a Memory Buffer | 9.8 | 0.0069 |  |
| [CVE-2022-31742](https://patchblox.com/security/data/cve/CVE-2022-31742.md) | High | Mozilla Thunderbird and 4 others: Observable Discrepancy | 9.8 | 0.0063 |  |
| [CVE-2022-31738](https://patchblox.com/security/data/cve/CVE-2022-31738.md) | High | Mozilla Thunderbird and 4 others: Authentication Bypass by Spoofing | 9.8 | 0.0062 |  |
| [CVE-2022-1834](https://patchblox.com/security/data/cve/CVE-2022-1834.md) | High | Mozilla Thunderbird and 1 other: Improper Certificate Validation | 9.8 | 0.0040 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo