Описание
Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Use-after-free in the Layout: Text and Fonts component
Отчет
Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Меры по смягчению последствий
--- CME Mitigation Guidance (2026-11-02) --- Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure. The highest-value action is to prevent execution of memory-unsafe operations during layout, text, and font rendering in browser engines: upgrade to Firefox 159 and Firefox ESR 153.6 (or the corresponding fixed Red Hat builds), which corrects memory lifetime management to prevent use-after-free conditions in the Layout: Text and Fonts component, closing all 2 injection vectors (crafted web page rendering text or fonts, crafted font or layout processing in a browser-like context). Until patched, this is a concern on users navigating to untrusted websites or viewing untrusted web content across all platforms, so restrict user navigation to untrusted websites and viewing of untrusted web content in affected browser sessions. As a compensating measure, enforce Address Space Layout Randomization to impede predictable control-flow redirection or ROP payload execution resulting from memory corruption. These controls limit blast radius and contain exploitation, but they do not fix the underlying use-after-free defect — apply the upstream patch to fully remediate. Highest-impact CME: CME-101 ASLR (Address Space Layout Randomization) (medium)
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | firefox | Affected | ||
| Red Hat Enterprise Linux 10 | rhel10/firefox-flatpak | Affected | ||
| Red Hat Enterprise Linux 10 | rhel10/thunderbird-flatpak | Affected | ||
| Red Hat Enterprise Linux 10 | thunderbird | Affected | ||
| Red Hat Enterprise Linux 6 | firefox | Out of support scope | ||
| Red Hat Enterprise Linux 6 | thunderbird | Out of support scope | ||
| Red Hat Enterprise Linux 7 | firefox | Affected | ||
| Red Hat Enterprise Linux 7 | thunderbird | Out of support scope | ||
| Red Hat Enterprise Linux 8 | firefox | Affected | ||
| Red Hat Enterprise Linux 8 | thunderbird | Affected |
Показывать по
Дополнительная информация
Статус:
7.5 High
CVSS3
Связанные уязвимости
Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Use-after-free in the Layout: Text and Fonts component. This vulnerabi ...
Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.
7.5 High
CVSS3