# RLSA-2022:0818: firefox security update

RLSA-2022:0818, released March 10, 2022, fixes 10 CVEs in firefox (version 0:91.7.0-3.el8_5). 2 of them are being exploited (CVE-2022-26485); 2 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/linux/rlsa-2022-0818
- Platform: Linux
- Released: Mar 10, 2022
- Priority: Patch now (Closes CVE-2022-26485, exploited (CISA KEV))
- CVEs: 10, exploited: 2, on CISA KEV: 2
- Vendor advisory: https://errata.rockylinux.org/RLSA-2022:0818

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | rocky 8 | 0:91.7.0-3.el8_5 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-26485](https://patchblox.com/security/data/cve/CVE-2022-26485.md) | Patch now | Mozilla Firefox Use-After-Free Vulnerability | 9.8 | 0.1426 | CISA KEV |
| [CVE-2022-26486](https://patchblox.com/security/data/cve/CVE-2022-26486.md) | Patch now | Mozilla Firefox Use-After-Free Vulnerability | 9.8 | 0.0236 | CISA KEV |
| [CVE-2022-26384](https://patchblox.com/security/data/cve/CVE-2022-26384.md) | Urgent | Mozilla Thunderbird and 4 others: Protection Mechanism Failure | 9.8 | 0.0097 |  |
| [CVE-2022-26381](https://patchblox.com/security/data/cve/CVE-2022-26381.md) | Urgent | Mozilla Thunderbird and 4 others: Use After Free | 9.8 | 0.0087 |  |
| [CVE-2022-26386](https://patchblox.com/security/data/cve/CVE-2022-26386.md) | Urgent | firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.  This... | 9.8 | 0.0071 |  |
| [CVE-2022-26383](https://patchblox.com/security/data/cve/CVE-2022-26383.md) | Urgent | Mozilla Thunderbird and 4 others: User Interface (UI) Misrepresentation of Critical Information | 9.8 | 0.0070 |  |
| [CVE-2022-26387](https://patchblox.com/security/data/cve/CVE-2022-26387.md) | Urgent | Mozilla Thunderbird and 4 others: Time-of-check Time-of-use (TOCTOU) Race Condition | 9.8 | 0.0066 |  |
| [CVE-2022-25236](https://patchblox.com/security/data/cve/CVE-2022-25236.md) | High | libxmltok1: xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namesp... | 9.8 | 0.3527 |  |
| [CVE-2022-25235](https://patchblox.com/security/data/cve/CVE-2022-25235.md) | High | libxmltok1: xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a... | 9.8 | 0.0496 |  |
| [CVE-2022-25315](https://patchblox.com/security/data/cve/CVE-2022-25315.md) | High | expat: In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames. | 9.8 | 0.0482 |  |

---

Data as of 2026-11-08T06:59:42Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.